WEBVTT 00:00:00.000 --> 00:00:03.520 Okay, let's unpack this. Welcome back to the 00:00:03.520 --> 00:00:06.320 Deep Dive. Today, we are immersing ourselves 00:00:06.320 --> 00:00:09.519 in the extraordinary life and, well, the volatile 00:00:09.519 --> 00:00:12.339 genius of one of the 20th century's most critical 00:00:12.339 --> 00:00:15.460 physicists, Sir Tandra Sikharavan Kadaraman. 00:00:15.619 --> 00:00:18.399 Siviraman, yes. And this is really a story about... 00:00:18.640 --> 00:00:21.179 Challenging, you know, colonial era scientific 00:00:21.179 --> 00:00:24.379 authority, achieving what seems impossible from 00:00:24.379 --> 00:00:27.600 a modest lab and a personality so formidable 00:00:27.600 --> 00:00:30.320 it both propelled monumental discovery and created 00:00:30.320 --> 00:00:33.359 decades of bitter controversy. It really is. 00:00:33.439 --> 00:00:36.000 And I think a good place to start is with the 00:00:36.000 --> 00:00:39.409 prize itself. In 1930, Raman wins the Nobel Prize 00:00:39.409 --> 00:00:41.250 in physics for his work on the scattering of 00:00:41.250 --> 00:00:43.570 light. What we now call the Raman effect. Exactly. 00:00:43.609 --> 00:00:46.130 And this achievement, it really rewrote the global 00:00:46.130 --> 00:00:49.210 map of science. He was the first Asian and, critically, 00:00:49.369 --> 00:00:51.990 the first non -white person to ever receive a 00:00:51.990 --> 00:00:53.710 Nobel in the sciences. You have to put that in 00:00:53.710 --> 00:00:55.450 context, right? You absolutely have to. I mean, 00:00:55.469 --> 00:00:57.409 this victory wasn't just some personal triumph. 00:00:57.630 --> 00:01:00.549 It was a profound statement that world -class 00:01:00.549 --> 00:01:02.329 foundational physics could come from outside 00:01:02.329 --> 00:01:04.129 the established, you know, the very well -funded 00:01:04.129 --> 00:01:06.379 centers of Europe and America. That immediately 00:01:06.379 --> 00:01:09.120 establishes our mission for this deep dive. We've 00:01:09.120 --> 00:01:11.319 taken your detailed source material, a really 00:01:11.319 --> 00:01:13.980 sweeping biography of his life, and we're pulling 00:01:13.980 --> 00:01:16.480 out the key intellectual moments, the brilliant 00:01:16.480 --> 00:01:19.159 science and the profound institutional battles 00:01:19.159 --> 00:01:21.719 that defined him. We want to understand not just 00:01:21.719 --> 00:01:24.299 what he discovered, but how his sheer force of 00:01:24.299 --> 00:01:27.819 will shaped the entire landscape of modern Indian 00:01:27.819 --> 00:01:30.379 research. Precisely. And we're tracking the genesis 00:01:30.379 --> 00:01:36.349 of this genius right from the start. into a Tamil 00:01:36.349 --> 00:01:39.189 Brahmin family. And his intellectual speed was, 00:01:39.290 --> 00:01:42.189 well, it was astonishing, almost aggressive. 00:01:42.609 --> 00:01:45.310 The timeline is just unbelievable. It is. He 00:01:45.310 --> 00:01:48.329 matriculated at age 11. 11. And he was enrolled 00:01:48.329 --> 00:01:50.909 in college by 13. 13, that's just phenomenal 00:01:50.909 --> 00:01:53.069 acceleration. And he didn't just attend, he completely 00:01:53.069 --> 00:01:57.329 dominated. By 16, he earned his BA with honors 00:01:57.329 --> 00:01:59.310 from the University of Madras. And the sources 00:01:59.310 --> 00:02:01.750 make a point of noting he swept the gold medals 00:02:01.750 --> 00:02:05.290 in both physics and English. Yes. And you should 00:02:05.290 --> 00:02:07.010 think about that combination for a moment. You 00:02:07.010 --> 00:02:11.330 have this rigorous mathematical precision and 00:02:11.330 --> 00:02:14.650 observational skill needed for physics combined 00:02:14.650 --> 00:02:18.810 with the verbal dexterity. The expressive power 00:02:18.810 --> 00:02:22.590 to articulate entirely new concepts to a very 00:02:22.590 --> 00:02:26.060 skeptical... global scientific community. That 00:02:26.060 --> 00:02:29.419 dual capacity, the ability to do the science 00:02:29.419 --> 00:02:31.860 and then to sell the science, that must have 00:02:31.860 --> 00:02:33.819 been absolutely crucial for someone operating 00:02:33.819 --> 00:02:35.699 outside the European establishment. Oh, completely. 00:02:35.919 --> 00:02:37.919 And he was already publishing his results before 00:02:37.919 --> 00:02:40.419 he even officially had his degree. That's the 00:02:40.419 --> 00:02:43.020 part that's just wild to me. Absolutely. His 00:02:43.020 --> 00:02:45.659 first scientific paper, it was on light diffraction 00:02:45.659 --> 00:02:48.060 from a rectangular aperture. Right. And he gets 00:02:48.060 --> 00:02:49.759 it published in the Philosophical Magazine in 00:02:49.759 --> 00:02:52.539 1906. Which, for our listeners, wasn't just any 00:02:52.539 --> 00:02:54.939 journal. That was the journal. That was the premier 00:02:54.939 --> 00:02:57.479 British journal of the time. I mean, the absolute 00:02:57.479 --> 00:03:00.099 top tier. And he's, what, 18 at this point, still 00:03:00.099 --> 00:03:02.180 a graduate student. He's already bypassing the 00:03:02.180 --> 00:03:04.560 academic ladder. I noticed in the sources that 00:03:04.560 --> 00:03:07.360 his second paper, something about the surface 00:03:07.360 --> 00:03:10.180 tension of liquids, was published in that same 00:03:10.180 --> 00:03:13.199 journal right alongside a paper by the legendary 00:03:13.199 --> 00:03:16.530 Lord Rayleigh. Yes. And that interaction is so 00:03:16.530 --> 00:03:19.870 telling. Rayleigh, who had no idea of Roman's 00:03:19.870 --> 00:03:23.789 youth or his limited resources, was so impressed 00:03:23.789 --> 00:03:25.729 that he started corresponding with him. And he 00:03:25.729 --> 00:03:27.770 addressed him as professor. Wait, courteously 00:03:27.770 --> 00:03:30.210 addressing the young man as professor. It really 00:03:30.210 --> 00:03:32.550 highlights that Roman was seen right from the 00:03:32.550 --> 00:03:35.789 start as this self -made scientific entity achieving 00:03:35.789 --> 00:03:38.090 international credibility based purely on the 00:03:38.090 --> 00:03:40.729 quality of his observation and analysis, despite 00:03:40.729 --> 00:03:43.479 his distance from the centers of power. So if 00:03:43.479 --> 00:03:45.319 Vermont was already getting letters from scientific 00:03:45.319 --> 00:03:47.960 legends, this brings us to that first great turning 00:03:47.960 --> 00:03:50.300 point in his career. Let's call it Section 2, 00:03:50.439 --> 00:03:53.699 the choice. Why, with this blazing scientific 00:03:53.699 --> 00:03:56.360 start, did he veer away from research and enter 00:03:56.360 --> 00:03:58.860 the incredibly conservative world of the civil 00:03:58.860 --> 00:04:00.800 service? Well, this choice was dictated by a 00:04:00.800 --> 00:04:03.319 cocktail of fate, institutional constraints, 00:04:03.620 --> 00:04:06.860 and, well, pragmatism. The most immediate factor 00:04:06.860 --> 00:04:09.969 was his health, wasn't it? It was. His physics 00:04:09.969 --> 00:04:12.990 teacher saw his potential and was desperate for 00:04:12.990 --> 00:04:15.629 him to go to England for advanced research. That 00:04:15.629 --> 00:04:17.930 was the hub, of course. But during the mandatory 00:04:17.930 --> 00:04:20.730 medical inspection for the scholarship, the doctor, 00:04:20.870 --> 00:04:24.029 Colonel Sir Gerald Gifford, delivered a pretty 00:04:24.029 --> 00:04:26.310 devastating verdict. He called him a weakling. 00:04:26.449 --> 00:04:29.329 A weakling, yes. And he flatly claimed that Ramon 00:04:29.329 --> 00:04:31.870 would die of tuberculosis if he was subjected 00:04:31.870 --> 00:04:35.519 to the cold, harsh English climate. Wow. So a 00:04:35.519 --> 00:04:37.579 completely preventative and you could argue an 00:04:37.579 --> 00:04:40.779 inaccurate colonial era medical assessment just 00:04:40.779 --> 00:04:43.220 slams the door on the traditional European academic 00:04:43.220 --> 00:04:46.160 track. It forces him onto a different path. Exactly. 00:04:46.540 --> 00:04:49.279 And that alternative path was the Indian Finance 00:04:49.279 --> 00:04:51.519 Service, the IFS. Which was the gold standard 00:04:51.519 --> 00:04:53.819 for prestige and stability under the British 00:04:53.819 --> 00:04:56.720 Raj. Absolutely. The intellectual elite. of the 00:04:56.720 --> 00:04:59.160 administrative class. Rahman sat for the entrance 00:04:59.160 --> 00:05:02.060 exam in 1907 and, well, predictably, he came 00:05:02.060 --> 00:05:04.120 in first. Of course he did. He secured his position 00:05:04.120 --> 00:05:06.759 as assistant accountant general in Calcutta at 00:05:06.759 --> 00:05:09.399 just 19 years old. The sources really emphasize 00:05:09.399 --> 00:05:11.560 the financial lure here. We're not just talking 00:05:11.560 --> 00:05:14.079 about a secure job. We're talking about massive 00:05:14.079 --> 00:05:16.860 social and financial elevation. It was a huge 00:05:16.860 --> 00:05:21.040 step up. His wife, Loka Simdari Amal, later made 00:05:21.040 --> 00:05:24.120 a famous, slightly wry comment about their marriage. 00:05:24.719 --> 00:05:27.279 She noted it was partially due to, and this is 00:05:27.279 --> 00:05:29.839 a quote, the extra allowance which the finance 00:05:29.839 --> 00:05:32.379 department gave to its married officers. A specific 00:05:32.379 --> 00:05:35.879 bonus for being married? An additional 150 rupees 00:05:35.879 --> 00:05:38.839 a month, which was a substantial sum at the time. 00:05:39.120 --> 00:05:42.439 The IFS guaranteed a comfortable life, high social 00:05:42.439 --> 00:05:44.720 standing, and, you know, lifelong stability. 00:05:45.079 --> 00:05:46.879 But Rahman clearly wasn't built for administrative 00:05:46.879 --> 00:05:49.439 stability. How long did the suit and tie last 00:05:49.439 --> 00:05:51.399 before the lab coat started calling him back? 00:05:51.560 --> 00:05:53.439 Not long at all. This is where his scientific 00:05:53.439 --> 00:05:56.420 drive really proves its power. While he's posted 00:05:56.420 --> 00:05:59.040 in Calcutta, he's riding a tram one day past 00:05:59.040 --> 00:06:02.100 210 Bobazar Street, and he sees a sign. The Indian 00:06:02.100 --> 00:06:04.420 Association for the Cultivation of Science, the 00:06:04.420 --> 00:06:06.959 IACS. Exactly. This was the first research institution 00:06:06.959 --> 00:06:10.000 established in India, founded way back in 1876 00:06:10.000 --> 00:06:13.740 by Dr. Mahendral Sarkar. But by 1907, it was 00:06:13.740 --> 00:06:16.089 essentially dormant. Just an empty building, 00:06:16.310 --> 00:06:19.189 more or less. A museum piece. It had produced 00:06:19.189 --> 00:06:21.870 virtually no research papers and lacked any regular 00:06:21.870 --> 00:06:24.370 active scientists. So Rahman, the accountant 00:06:24.370 --> 00:06:27.250 general, essentially stumbles upon this abandoned, 00:06:27.430 --> 00:06:30.449 potentially world -class physical space in the 00:06:30.449 --> 00:06:32.250 heart of the city? That's the perfect way to 00:06:32.250 --> 00:06:34.569 put it. He immediately gets permission to use 00:06:34.569 --> 00:06:37.350 the facilities. And crucially, because he's employed 00:06:37.350 --> 00:06:39.410 full -time by the government, he can only do 00:06:39.410 --> 00:06:42.529 research at very unusual hours. Early mornings, 00:06:42.790 --> 00:06:45.879 late nights, weekends. Exactly. He transforms 00:06:45.879 --> 00:06:48.100 that empty vessel into a functional research 00:06:48.100 --> 00:06:51.560 center through sheer determination. His article 00:06:51.560 --> 00:06:54.399 on Newton's Rings in Polarized Light, published 00:06:54.399 --> 00:06:57.819 in Nature in 1907, became the very first genuine 00:06:57.819 --> 00:07:00.379 research paper to ever emerge from the IACS. 00:07:00.459 --> 00:07:02.759 So he uses private time, sacrificing stability 00:07:02.759 --> 00:07:05.399 and leisure, to build a world -class institution 00:07:05.399 --> 00:07:08.339 from scratch. Which makes his next step... what 00:07:08.339 --> 00:07:10.920 the sources call his supreme sacrifice, logical 00:07:10.920 --> 00:07:13.759 but still just astonishing. It is the defining 00:07:13.759 --> 00:07:18.220 moment of his dedication. In 1917, after 10 years 00:07:18.220 --> 00:07:21.740 of service in the IFS, he resigns. He resigns 00:07:21.740 --> 00:07:23.779 from his high -paying, ultra -secure government 00:07:23.779 --> 00:07:27.000 job to accept the newly created Pallet Professorship 00:07:27.000 --> 00:07:29.660 of Physics at the University of Calcutta. And 00:07:29.660 --> 00:07:32.290 the sources are very clear on this. His new salary 00:07:32.290 --> 00:07:35.209 as a professor was roughly half of what he had 00:07:35.209 --> 00:07:37.949 been earning. Half. This was a tremendous financial 00:07:37.949 --> 00:07:40.350 and professional risk, especially in colonial 00:07:40.350 --> 00:07:43.129 India. So what was the tradeoff besides just 00:07:43.129 --> 00:07:45.490 pure passion? What were the terms of the professorship 00:07:45.490 --> 00:07:48.610 that made that salary cut worthwhile? The terms 00:07:48.610 --> 00:07:51.769 were a scientist's dream. Total academic freedom. 00:07:52.439 --> 00:07:54.860 The offer stipulated that he would, and I'm quoting 00:07:54.860 --> 00:07:57.379 here, not be required to take any teaching work 00:07:57.379 --> 00:08:00.360 in MA and MSC classes to the detriment of his 00:08:00.360 --> 00:08:02.620 own research or assisting advanced students in 00:08:02.620 --> 00:08:04.740 their researches. So he exchanged stability and 00:08:04.740 --> 00:08:06.519 money for complete control over his research 00:08:06.519 --> 00:08:08.639 and the ability to mentor students. All of his 00:08:08.639 --> 00:08:10.819 energy could now go to the lab. That sounds like 00:08:10.819 --> 00:08:13.100 a powerful institutional endorsement, but the 00:08:13.100 --> 00:08:14.839 sources indicate this appointment was immediately 00:08:14.839 --> 00:08:17.019 met with resistance from inside the university. 00:08:17.639 --> 00:08:19.879 It was very contentious. Many of the foreign 00:08:19.879 --> 00:08:21.980 members of the Senate objected, and they objected 00:08:21.980 --> 00:08:25.040 strongly. Their rationale was, frankly, pure 00:08:25.040 --> 00:08:27.300 colonial prejudice. Brahman didn't have a Ph 00:08:27.300 --> 00:08:29.540 .D. He lacked a Ph .D., and he had never studied 00:08:29.540 --> 00:08:32.299 in Europe. He didn't follow the prescribed academic 00:08:32.299 --> 00:08:35.539 trajectory. His homegrown genius was literally 00:08:35.539 --> 00:08:37.559 being held against him. So how did he get past 00:08:37.559 --> 00:08:40.539 that? This is where the power of Sir Ashutosh 00:08:40.539 --> 00:08:42.720 Mukherjee, the vice chancellor of the University 00:08:42.720 --> 00:08:46.409 of Calcutta, came in. Mukherjee just bypassed 00:08:46.409 --> 00:08:48.809 the objections. He arranged for an honorary doctor 00:08:48.809 --> 00:08:52.330 of science, a DSC, to be conferred upon Rahman 00:08:52.330 --> 00:08:55.429 by the university in 1921. A formal acknowledgement 00:08:55.429 --> 00:08:58.669 that his published, proven research was more 00:08:58.669 --> 00:09:00.350 important than a piece of paper from Europe. 00:09:00.549 --> 00:09:02.470 It far outweighed the need for formal European 00:09:02.470 --> 00:09:04.750 accreditation, yes. By the time he was elected 00:09:04.750 --> 00:09:07.950 a fellow of the Royal Society and FRS in 1924, 00:09:08.250 --> 00:09:10.710 he must have felt scientifically untouchable. 00:09:10.830 --> 00:09:12.870 He was truly a global competitor at that point. 00:09:13.029 --> 00:09:16.259 He was. And he knew it. His ambition was now 00:09:16.259 --> 00:09:19.000 completely unrestrained. When Mukherjee asked 00:09:19.000 --> 00:09:21.519 him what goal he would pursue next after the 00:09:21.519 --> 00:09:24.840 FRS election, Rahman's reply was that classic 00:09:24.840 --> 00:09:28.440 confident declaration, the Nobel Prize, of course. 00:09:28.580 --> 00:09:30.659 It wasn't just ambition, was it? It was this 00:09:30.659 --> 00:09:33.419 almost belligerent confidence that he belonged 00:09:33.419 --> 00:09:35.899 to the absolute pinnacle of world science. And 00:09:35.899 --> 00:09:38.789 he had the empirical proof to back it up. You 00:09:38.789 --> 00:09:41.490 have to wonder if that kind of hubris was necessary 00:09:41.490 --> 00:09:44.649 for a scientist operating outside the established 00:09:44.649 --> 00:09:47.490 Western network. It's a fascinating question. 00:09:47.649 --> 00:09:49.570 It seems like that ferocious confidence was an 00:09:49.570 --> 00:09:51.940 essential shield. Moving into section three, 00:09:52.039 --> 00:09:53.940 let's look at the scientific groundwork that 00:09:53.940 --> 00:09:56.700 led to the Nobel. Before the definitive light 00:09:56.700 --> 00:09:59.019 scattering work, Raman spent a significant amount 00:09:59.019 --> 00:10:01.840 of time on acoustics. For someone who was destined 00:10:01.840 --> 00:10:05.220 for a Nobel in physics, why this big detour into 00:10:05.220 --> 00:10:07.399 the vibrations of musical instruments? Well, 00:10:07.480 --> 00:10:10.379 it wasn't really a detour. It was more of a conceptual 00:10:10.379 --> 00:10:13.919 training ground. Raman's early obsession with 00:10:13.919 --> 00:10:17.100 acoustics, which started back at the IACS, was 00:10:17.100 --> 00:10:20.710 fundamentally a study of wave phenomena. vibration, 00:10:20.870 --> 00:10:24.419 harmonic structure. He was deeply inspired by 00:10:24.419 --> 00:10:27.279 Hermann von Helmholtz's seminal work, The Sensations 00:10:27.279 --> 00:10:30.039 of Tone. So he was applying the rigor of physics 00:10:30.039 --> 00:10:32.620 to explain the aesthetics of sound. Exactly. 00:10:32.679 --> 00:10:35.039 He did these highly detailed studies on things 00:10:35.039 --> 00:10:38.360 like the wolf note phenomenon. That sudden jarring 00:10:38.360 --> 00:10:41.460 sound on violins and cellos. Yes, that unstable 00:10:41.460 --> 00:10:44.240 sound you get on certain notes. He meticulously 00:10:44.240 --> 00:10:47.080 analyzed the complex vibrations of the bridge 00:10:47.080 --> 00:10:49.740 and the body that caused this effect. If you 00:10:49.740 --> 00:10:51.460 think about it, acoustics is all about these 00:10:51.460 --> 00:10:53.559 subtle... shifts in frequency, resonance, energy 00:10:53.559 --> 00:10:56.639 transfer. Right. It sounds like the perfect conceptual 00:10:56.639 --> 00:10:59.220 prelude to light scattering, which is essentially 00:10:59.220 --> 00:11:01.279 about subtle shifts in wavelength and energy 00:11:01.279 --> 00:11:03.440 transfer. That's the core intellectual connection. 00:11:03.480 --> 00:11:05.559 That's what we need to highlight. He was training 00:11:05.559 --> 00:11:09.059 his experimental eye to detect and quantify subtle 00:11:09.059 --> 00:11:11.500 shifts in vibration patterns. And he applied 00:11:11.500 --> 00:11:14.019 this rigor to instruments that Western science 00:11:14.019 --> 00:11:16.870 had largely ignored. He did. He conducted the 00:11:16.870 --> 00:11:19.389 first scientific studies analyzing the harmonic 00:11:19.389 --> 00:11:22.049 structure of sounds produced by the tabla and 00:11:22.049 --> 00:11:24.870 the meridangam. So instead of just dismissing 00:11:24.870 --> 00:11:27.570 them as simple drums, he analyzed them as these 00:11:27.570 --> 00:11:30.370 complex acoustical systems. And he proved they 00:11:30.370 --> 00:11:32.690 produced sounds with rich, organized harmonic 00:11:32.690 --> 00:11:35.629 overtones. He challenged the simplistic view 00:11:35.629 --> 00:11:38.210 and put them on the same scientific footing as, 00:11:38.350 --> 00:11:41.590 say, the Western violin. Even his 1921 visit 00:11:41.590 --> 00:11:43.909 to England, which was brief, was used to study 00:11:43.909 --> 00:11:46.610 sound propagation in the dome of St. Paul's Cathedral. 00:11:47.279 --> 00:11:49.659 The famous whispering gallery effect, yes. He 00:11:49.659 --> 00:11:52.100 was investigating how sound waves cling to curved 00:11:52.100 --> 00:11:54.899 surfaces. It was all part of this deep dive into 00:11:54.899 --> 00:11:57.460 wave physics. And all this expertise in wave 00:11:57.460 --> 00:11:59.700 phenomena culminates in that pivotal moment that 00:11:59.700 --> 00:12:02.679 shifts his focus entirely from sound to light. 00:12:02.799 --> 00:12:05.860 The famous sea color controversy. This is one 00:12:05.860 --> 00:12:09.340 of the most romantic and consequential shipboard 00:12:09.340 --> 00:12:11.919 observations in the history of science. It's 00:12:11.919 --> 00:12:14.620 September 1921. He's sailing back to India from 00:12:14.620 --> 00:12:17.320 England on the SS Narcunda. And he finds himself 00:12:17.320 --> 00:12:19.700 just contemplating the deep blue of the Mediterranean 00:12:19.700 --> 00:12:22.700 Sea. And the prevailing wisdom from Lord Rayleigh 00:12:22.700 --> 00:12:25.279 was that the blue color of the sea was just a 00:12:25.279 --> 00:12:28.299 reflection of the blue sky. Exactly. An optical 00:12:28.299 --> 00:12:31.039 illusion. The idea was that the sea was simply 00:12:31.039 --> 00:12:33.679 reflecting light from the blue sky, scattered 00:12:33.679 --> 00:12:35.940 according to the famous Rayleigh scattering formula. 00:12:36.240 --> 00:12:39.700 Which, again, sounds perfectly logical. But Roman 00:12:39.700 --> 00:12:43.039 looked deeper. He did. And he used surprisingly 00:12:43.039 --> 00:12:46.740 simple tools. a pocket spectroscope, and something 00:12:46.740 --> 00:12:49.639 called a Nicole prism. What's a Nicole prism? 00:12:49.820 --> 00:12:52.360 It's a piece of calcite crystal that filters 00:12:52.360 --> 00:12:55.759 light polarization. He used it specifically to 00:12:55.759 --> 00:12:58.379 eliminate surface reflections, to block the scattered 00:12:58.379 --> 00:13:00.980 light coming from the sky. Okay, so if Rayleigh's 00:13:00.980 --> 00:13:02.960 theory was correct, when he looked through the 00:13:02.960 --> 00:13:05.500 prism, the sea should have turned dark or gray. 00:13:05.779 --> 00:13:08.320 It should have. but instead it appeared even 00:13:08.320 --> 00:13:10.519 more intensely, intrinsically blue. That was 00:13:10.519 --> 00:13:12.860 the observational contradiction that launched 00:13:12.860 --> 00:13:15.700 his most famous work. If the blue wasn't reflected 00:13:15.700 --> 00:13:18.159 skylight, what on earth was causing it? Raman 00:13:18.159 --> 00:13:20.299 immediately proposed an alternative mechanism, 00:13:20.639 --> 00:13:23.120 molecular diffraction. Which is the scattering 00:13:23.120 --> 00:13:26.039 of light by the water molecules themselves? Yes. 00:13:26.399 --> 00:13:28.600 Think of the light hitting the tiny individual 00:13:28.600 --> 00:13:32.320 water molecules and being redirected. He suggested 00:13:32.320 --> 00:13:34.700 that the vast number of these molecules, rather 00:13:34.700 --> 00:13:37.320 than surface reflection, were diffracting the 00:13:37.320 --> 00:13:39.539 blue wavelengths more efficiently. And he rushed 00:13:39.539 --> 00:13:41.840 a note to nature as soon as the ship docked. 00:13:41.860 --> 00:13:44.820 Titled The Color of the Sea, yes. He argued that 00:13:44.820 --> 00:13:47.460 Rayleigh's explanation was, quote, questionable 00:13:47.460 --> 00:13:50.240 by a simple mode of observation. And this wasn't 00:13:50.240 --> 00:13:52.820 just a philosophical musing. This became a concrete 00:13:52.820 --> 00:13:55.679 research agenda back in Calcutta, right? Absolutely. 00:13:55.960 --> 00:13:58.720 He put his students, including K .R. Ramanathan, 00:13:58.860 --> 00:14:01.379 to work. They used the Bay of Bengal as their 00:14:01.379 --> 00:14:04.279 laboratory, confirming experimentally that the 00:14:04.279 --> 00:14:06.600 blue color persisted even when the sky was cloudy 00:14:06.600 --> 00:14:09.669 or when observing from depth. So this work, done 00:14:09.669 --> 00:14:12.750 with ingenuity and minimal equipment at the IACS, 00:14:12.789 --> 00:14:15.889 it validated his insight. Completely. The blue 00:14:15.889 --> 00:14:18.250 color of the deep sea is intrinsic to the water 00:14:18.250 --> 00:14:21.509 itself, caused by molecular scattering. And this 00:14:21.509 --> 00:14:24.149 success, it fortified his belief that he could 00:14:24.149 --> 00:14:26.049 challenge the established giants of European 00:14:26.049 --> 00:14:28.690 science with nothing more than sharp observation 00:14:28.690 --> 00:14:31.590 and brilliant conceptual analysis. That mastery 00:14:31.590 --> 00:14:33.669 of light scattering brings us directly to Section 00:14:33.669 --> 00:14:38.309 4, the quantum leap. He had proved that molecules 00:14:38.309 --> 00:14:40.590 scatter light but now he was searching for something 00:14:40.590 --> 00:14:42.830 that would fundamentally prove the quantum nature 00:14:42.830 --> 00:14:46.250 of light itself. The stage was set, but the definitive 00:14:46.250 --> 00:14:49.889 discovery really needed a push. Raman had actually 00:14:49.889 --> 00:14:53.450 seen a faint spectral shift years earlier, around 00:14:53.450 --> 00:14:56.629 1923, when filtering sunlight through violet 00:14:56.629 --> 00:14:59.009 glass. But an associate dismissed it, right? 00:14:59.250 --> 00:15:01.509 Dismissed the resulting faint lines as a mere 00:15:01.509 --> 00:15:04.090 trace of fluorescence. They knew something was 00:15:04.090 --> 00:15:06.529 happening, but they lacked the conceptual framework 00:15:06.529 --> 00:15:08.990 to fully interpret it. And the required catalyst 00:15:08.990 --> 00:15:12.629 arrived in December 1927. Yes, the news that 00:15:12.629 --> 00:15:14.649 Arthur Compton had won the Nobel Prize for the 00:15:14.649 --> 00:15:17.240 Compton Effect. It electrified the Calcutta lab. 00:15:17.480 --> 00:15:19.419 Remind us what the Compton effect is. Compton 00:15:19.419 --> 00:15:21.580 had demonstrated that when X -rays, a form of 00:15:21.580 --> 00:15:23.700 electromagnetic wave, interacted with matter, 00:15:23.759 --> 00:15:26.000 they behaved like particles, and their wavelengths 00:15:26.000 --> 00:15:28.779 changed during the scattering. It was a profound 00:15:28.779 --> 00:15:31.000 experimental confirmation of quantum theory. 00:15:31.320 --> 00:15:33.919 And Raman saw that result and immediately extrapolated 00:15:33.919 --> 00:15:36.259 it from X -rays to visible light. The moment 00:15:36.259 --> 00:15:39.100 he heard the news, he famously declared to his 00:15:39.100 --> 00:15:42.860 associate, K .S. Krishnan. Excellent news. If 00:15:42.860 --> 00:15:45.580 this is true of X -rays, it must be true of light, 00:15:45.659 --> 00:15:48.419 too. I have always thought so. There must be 00:15:48.419 --> 00:15:51.240 an optical analog to Compton effect. We must 00:15:51.240 --> 00:15:53.779 pursue it, and we are on the right lines. It 00:15:53.779 --> 00:15:56.940 must and shall be found. The Nobel Prize must 00:15:56.940 --> 00:16:00.519 be won. Wow. That quote just perfectly frames 00:16:00.519 --> 00:16:03.320 the scientific race and the sheer ambition driving 00:16:03.320 --> 00:16:05.139 them for the next two months. They weren't just 00:16:05.139 --> 00:16:07.299 searching for a discovery. They were hunting 00:16:07.299 --> 00:16:09.820 the Nobel Prize. The experiments began immediately. 00:16:10.330 --> 00:16:13.429 in January 1928, with Krishnan doing most of 00:16:13.429 --> 00:16:16.289 the work at the bench. A key early finding came 00:16:16.289 --> 00:16:19.529 on January 7th. Krishnan noted that pure liquids 00:16:19.529 --> 00:16:22.210 consistently produced a kind of polarized fluorescence. 00:16:22.330 --> 00:16:24.049 But they realized it wasn't fluorescence. They 00:16:24.049 --> 00:16:25.889 quickly realized this wasn't fluorescence, which 00:16:25.889 --> 00:16:28.330 is a rapid emission of light, but something totally 00:16:28.330 --> 00:16:30.970 new, something they labeled modified scattering. 00:16:31.500 --> 00:16:33.419 Now, we need to understand the mechanism here. 00:16:33.539 --> 00:16:35.480 What exactly were they looking for to confirm 00:16:35.480 --> 00:16:37.720 this was a new effect, fundamentally different 00:16:37.720 --> 00:16:40.559 from Rayleigh scattering or fluorescence? This 00:16:40.559 --> 00:16:42.720 is the crucial technical detail we need to unpack 00:16:42.720 --> 00:16:45.759 for this deep dive. Rayleigh scattering is what 00:16:45.759 --> 00:16:48.879 we call elastic. The light bounces off the molecule 00:16:48.879 --> 00:16:52.039 without losing or gaining any energy. So the 00:16:52.039 --> 00:16:54.980 wavelength or the color stays exactly the same. 00:16:55.200 --> 00:16:57.879 Exactly. Raman was looking for inelastic scattering. 00:16:58.350 --> 00:17:00.870 Inelastic scattering implies an energy exchange 00:17:00.870 --> 00:17:04.210 is happening. Precisely. In simple terms, when 00:17:04.210 --> 00:17:06.690 the incoming light particle, the photon, hits 00:17:06.690 --> 00:17:09.549 a molecule, there are two key possibilities for 00:17:09.549 --> 00:17:12.690 this inelastic interaction. First, the photon 00:17:12.690 --> 00:17:14.690 can transfer some of its energy to the molecule, 00:17:14.990 --> 00:17:17.869 making the molecule vibrate faster. The photon, 00:17:18.150 --> 00:17:20.849 now having less energy, shifts to a longer wavelength, 00:17:21.130 --> 00:17:23.430 a redder color. These are called Stokes lines. 00:17:23.650 --> 00:17:26.309 Okay. And the second possibility. If the molecule 00:17:26.309 --> 00:17:28.250 is already vibrating, the photon can actually 00:17:28.250 --> 00:17:30.890 pick up that excess energy when it hits. This 00:17:30.890 --> 00:17:32.730 results in a shorter wavelength, a bluer color. 00:17:32.950 --> 00:17:35.329 And these are called anti -Stokes lines. So the 00:17:35.329 --> 00:17:37.690 presence of these new shifted lines is the proof. 00:17:37.829 --> 00:17:40.150 It confirms that the photon interacted dynamically 00:17:40.150 --> 00:17:42.670 with the vibrational and rotational states of 00:17:42.670 --> 00:17:45.579 the molecule. It's a direct confirmation. The 00:17:45.579 --> 00:17:47.720 color change isn't random. It's a precise measure 00:17:47.720 --> 00:17:49.680 of the energy states of the molecule itself. 00:17:49.960 --> 00:17:52.200 They just needed the technology to see those 00:17:52.200 --> 00:17:54.599 tiny, shifted lines clearly. Which brings us 00:17:54.599 --> 00:17:57.660 to the defining moment of February 28, 1928. 00:17:57.819 --> 00:18:01.619 Yes. They needed clear spectral evidence. Raymond 00:18:01.619 --> 00:18:04.579 utilized a newly designed spectrograph, a piece 00:18:04.579 --> 00:18:06.720 of equipment that separates light into its component 00:18:06.720 --> 00:18:09.779 wavelengths, powered by a powerful, filtered 00:18:09.779 --> 00:18:12.720 mercury arc lamp. And that night, it worked. 00:18:13.240 --> 00:18:15.279 That light examining the scattered light from 00:18:15.279 --> 00:18:17.599 a liquid sample, the spectral photographs confirmed 00:18:17.599 --> 00:18:20.740 it. Beside the intensely bright original Mercury 00:18:20.740 --> 00:18:23.259 line, there appeared faint but undeniable new 00:18:23.259 --> 00:18:26.099 lines, the shifted Stokes and anti -Stokes lines. 00:18:26.420 --> 00:18:28.980 That spectral shift confirmed the energy exchange, 00:18:29.359 --> 00:18:32.500 the Raman effect. And true to his showman nature, 00:18:32.759 --> 00:18:34.880 the announcement was immediate and dramatic. 00:18:35.240 --> 00:18:37.900 The very next day, February 29th, the news was 00:18:37.900 --> 00:18:40.460 wired to the Associated Press of India. The headline 00:18:40.460 --> 00:18:43.500 was, New Theory of Radiation. Professor Raman's 00:18:43.500 --> 00:18:45.819 discovery. He knew immediately how universal 00:18:45.819 --> 00:18:48.839 it was, didn't he? He did. He showed this spectral 00:18:48.839 --> 00:18:51.500 shift occurred not just in the complex molecular 00:18:51.500 --> 00:18:54.380 structure of crystals, but across simple liquids, 00:18:54.579 --> 00:18:58.740 gases, and solids. He had discovered a new universal 00:18:58.740 --> 00:19:01.859 physical phenomenon. That kind of audacity surely 00:19:01.859 --> 00:19:04.200 invited global scrutiny, especially from the 00:19:04.200 --> 00:19:06.420 established figures in Europe. Was there skepticism? 00:19:06.809 --> 00:19:09.730 Oh, intense skepticism. Initial reports of shifted 00:19:09.730 --> 00:19:12.750 lines were often dismissed as experimental error 00:19:12.750 --> 00:19:15.450 or contamination. Major European physicists, 00:19:15.809 --> 00:19:17.730 including Arnold Sommerfeld and George Hughes, 00:19:17.890 --> 00:19:20.150 they tried to reproduce the results and they 00:19:20.150 --> 00:19:23.349 failed at first. Why did they fail? Their equipment 00:19:23.349 --> 00:19:25.869 or their filtering methods just weren't sensitive 00:19:25.869 --> 00:19:28.309 enough. They questioned whether the faint lines 00:19:28.309 --> 00:19:31.029 were just a form of spurious fluorescence. So 00:19:31.029 --> 00:19:33.869 who validated the work? Who was it that guaranteed 00:19:33.869 --> 00:19:36.140 its place in history? The crucial independent 00:19:36.140 --> 00:19:39.859 confirmation arrived later in June 1928 from 00:19:39.859 --> 00:19:41.680 Peter Pringsheim at the University of Berlin. 00:19:42.180 --> 00:19:44.259 Pringsheim successfully reproduced the results 00:19:44.259 --> 00:19:46.359 using cleaner substances and better filtering, 00:19:46.519 --> 00:19:49.119 and he validated Raman's claims. And it was Pringsheim 00:19:49.119 --> 00:19:51.640 who coined the name, right? Yes, it was Pringsheim 00:19:51.640 --> 00:19:54.480 who coined the lasting terminology, calling the 00:19:54.480 --> 00:19:56.940 phenomenon the Raman effect, and the shifted 00:19:56.940 --> 00:19:59.779 spectral lines the Linnean -Raman effects, the 00:19:59.779 --> 00:20:02.180 Raman lines. The ultimate outcome of this discovery 00:20:02.180 --> 00:20:05.509 fundamentally changed physics. What was its true 00:20:05.509 --> 00:20:09.009 lasting significance beyond just the prize? The 00:20:09.009 --> 00:20:11.150 Raman effect provided one of the earliest and 00:20:11.150 --> 00:20:14.190 most robust experimental proofs of the quantum 00:20:14.190 --> 00:20:17.109 nature of light, the definitive particle -wave 00:20:17.109 --> 00:20:20.490 duality. It showed the photon engaging in a dynamic 00:20:20.490 --> 00:20:23.230 energy exchange, confirming its particle -like 00:20:23.230 --> 00:20:25.509 behavior. And what did the other giants of physics 00:20:25.509 --> 00:20:28.630 think? Robert W. Wood, a major physicist at Johns 00:20:28.630 --> 00:20:31.029 Hopkins, called it one of the most convincing 00:20:31.029 --> 00:20:34.019 proofs of the quantum theory. And Ernest Rutherford, 00:20:34.099 --> 00:20:35.960 the towering figure of experimental physics, 00:20:36.180 --> 00:20:39.180 he ranked it among the best three or four discoveries 00:20:39.180 --> 00:20:41.400 in experimental physics in the last decade. And 00:20:41.400 --> 00:20:44.099 the practical legacy is Raman spectroscopy. Yes. 00:20:44.339 --> 00:20:46.619 Because the shift in the scattered light is unique 00:20:46.619 --> 00:20:48.759 to the vibrational modes of the molecule it struck, 00:20:49.039 --> 00:20:51.279 the Raman effect creates a molecular fingerprint. 00:20:51.799 --> 00:20:54.500 Raman spectroscopy is now an indispensable tool 00:20:54.500 --> 00:20:57.279 in chemistry, forensics, medicine, material science. 00:20:57.819 --> 00:21:00.680 So scientists can identify substances based purely 00:21:00.680 --> 00:21:03.779 on their unique spectral shift. Exactly. And 00:21:03.779 --> 00:21:05.559 all of this came from a scientist who famously 00:21:05.559 --> 00:21:08.019 boasted, perhaps with some exaggeration, when 00:21:08.019 --> 00:21:10.059 I got my Nobel Prize, I had spent hardly 200 00:21:10.059 --> 00:21:13.380 rupees on my equipment. It just underscores this 00:21:13.380 --> 00:21:16.240 triumph of intellectual ingenuity over massive 00:21:16.240 --> 00:21:19.519 institutional budgets. That victory in 1930 confirms 00:21:19.519 --> 00:21:21.940 that Raman was right all along in his self -belief. 00:21:22.269 --> 00:21:24.210 His certainty of winning the Nobel was almost 00:21:24.210 --> 00:21:26.450 as famous as the discovery itself. The Nobel 00:21:26.450 --> 00:21:29.230 fixation was absolute. He was intensely disappointed 00:21:29.230 --> 00:21:32.910 in 1928 and 1929 when he was passed over. But 00:21:32.910 --> 00:21:35.609 in 1930, his confidence was so total that he 00:21:35.609 --> 00:21:37.829 booked steamship tickets to Stockholm for himself 00:21:37.829 --> 00:21:40.470 and his wife in July. Four months before the 00:21:40.470 --> 00:21:42.630 official announcement in November. Four months. 00:21:42.869 --> 00:21:45.430 His wife recalled him obsessively scanning the 00:21:45.430 --> 00:21:47.670 newspaper every single morning, just desperate 00:21:47.670 --> 00:21:50.039 for the confirmation. when he was asked about 00:21:50.039 --> 00:21:52.640 sharing the prize given the possibility that 00:21:52.640 --> 00:21:55.019 the discovery could have been shared his competitive 00:21:55.019 --> 00:21:57.880 nature immediately came out he was completely 00:21:57.880 --> 00:22:01.940 unapologetic he stated flatly that i should have 00:22:01.940 --> 00:22:04.059 shared the nobel prize with compton and i should 00:22:04.059 --> 00:22:06.119 not have liked that i would rather receive the 00:22:06.119 --> 00:22:08.079 whole of it It wasn't just about the science. 00:22:08.140 --> 00:22:10.859 It was about the singular, undeniable validation 00:22:10.859 --> 00:22:14.400 of his life's work. So following the Nobel, Rahman 00:22:14.400 --> 00:22:16.819 shifted his focus dramatically from discovery 00:22:16.819 --> 00:22:19.859 in Calcutta to institutional leadership and applied 00:22:19.859 --> 00:22:22.660 physics in Bangalore. This marked the next major 00:22:22.660 --> 00:22:26.140 phase of his career. In 1933, he accepted the 00:22:26.140 --> 00:22:28.079 position of the first Indian director of the 00:22:28.079 --> 00:22:31.920 Indian Institute of Science, or ISC, in Bangalore. 00:22:32.140 --> 00:22:34.319 This was a massive transition into administration. 00:22:34.619 --> 00:22:37.200 A huge transition aimed at shaping the future 00:22:37.200 --> 00:22:40.000 of Indian scientific infrastructure. He also 00:22:40.000 --> 00:22:42.039 leveraged his authority to found the Indian Academy 00:22:42.039 --> 00:22:45.619 of Sciences in 1934 and later the Raman Research 00:22:45.619 --> 00:22:49.339 Institute, the RRI, in 1948, which really became 00:22:49.339 --> 00:22:51.579 his personal sanctuary and final laboratory. 00:22:52.079 --> 00:22:55.319 During this post -Nobel era, what were his major 00:22:55.319 --> 00:22:57.599 scientific contributions? Was he able to maintain 00:22:57.599 --> 00:23:00.440 that same level of fundamental inquiry? Oh, absolutely. 00:23:01.019 --> 00:23:03.339 One of his most important contributions in applied 00:23:03.339 --> 00:23:06.940 physics was the celebrated Ramanath theory, which 00:23:06.940 --> 00:23:09.220 he developed with his student, Nagendranath. 00:23:09.359 --> 00:23:11.720 And this was the foundational theoretical explanation 00:23:11.720 --> 00:23:14.099 for the acousto -optic effect. That's right. 00:23:14.220 --> 00:23:16.779 Let's be precise. What is the acousto -optic 00:23:16.779 --> 00:23:19.019 effect, and why is it still important now? The 00:23:19.019 --> 00:23:22.059 acousto -optic effect is essentially the diffraction 00:23:22.059 --> 00:23:25.000 or scattering of light by high -frequency sound 00:23:25.000 --> 00:23:28.000 waves, specifically ultrasound waves traveling 00:23:28.000 --> 00:23:30.680 through a transparent medium. So the sound waves 00:23:30.680 --> 00:23:33.799 create these periodic density variations in the 00:23:33.799 --> 00:23:36.079 medium. Which act like a diffraction grating. 00:23:36.420 --> 00:23:38.880 Light passing through this area is scattered 00:23:38.880 --> 00:23:42.400 by the acoustic waves. The Ramanath theory provided 00:23:42.400 --> 00:23:45.140 the exact mathematical basis for predicting this 00:23:45.140 --> 00:23:47.160 light scattering. And why does this matter today? 00:23:47.420 --> 00:23:50.299 Today, acoustic optic modulators, deflectors, 00:23:50.319 --> 00:23:52.880 and filters are critical components in modern 00:23:52.880 --> 00:23:55.539 telecommunications, fiber optics, and high -speed 00:23:55.539 --> 00:23:58.319 laser scanning systems. So he moved from a... 00:23:58.559 --> 00:24:01.880 purely conceptual quantum discovery to laying 00:24:01.880 --> 00:24:04.299 the theoretical groundwork for modern optical 00:24:04.299 --> 00:24:07.319 engineering. Yes, it just demonstrates his versatility. 00:24:07.519 --> 00:24:09.619 But what's particularly striking about his later 00:24:09.619 --> 00:24:12.160 career is his focus on the aesthetics of the 00:24:12.160 --> 00:24:15.400 physical world. He dedicated decades to understanding 00:24:15.400 --> 00:24:17.779 color, iridescence, and crystalline structure. 00:24:18.329 --> 00:24:20.150 That's where the intellectual connection between 00:24:20.150 --> 00:24:22.930 acoustics, the Raman effect, and his later work 00:24:22.930 --> 00:24:25.450 on gems comes into sharp focus, isn't it? It's 00:24:25.450 --> 00:24:28.309 a relentless lifelong pursuit of understanding 00:24:28.309 --> 00:24:31.109 how molecular structure dictates light interaction. 00:24:31.630 --> 00:24:35.470 From 1944 to 1968, he devoted immense energy 00:24:35.470 --> 00:24:38.069 to studying the properties of diamond. Why diamond? 00:24:38.289 --> 00:24:40.869 He analyzed its subtle fluorescence, its hardness, 00:24:41.109 --> 00:24:43.630 its crystal lattice structure, using diamond 00:24:43.630 --> 00:24:45.910 itself as a key material for studying crystal 00:24:45.910 --> 00:24:48.730 vibrations, which is a direct continuation of 00:24:48.730 --> 00:24:50.289 the principles underlying the Raymond effect. 00:24:50.700 --> 00:24:53.180 And he also studied many common, beautiful, but 00:24:53.180 --> 00:24:56.460 complex materials. He was captivated by the optical 00:24:56.460 --> 00:24:59.519 physics of everyday iridescent materials. Opal, 00:24:59.539 --> 00:25:03.339 agate, labradorite, pearly feldspar, the optical 00:25:03.339 --> 00:25:06.420 behavior of pearls. He wasn't just looking at 00:25:06.420 --> 00:25:09.000 them. He was trying to understand the exact physical 00:25:09.000 --> 00:25:11.740 mechanism, whether it was structural color, interference, 00:25:12.099 --> 00:25:14.900 or molecular alignment, that produced that visual 00:25:14.900 --> 00:25:17.259 splendor. He saw aesthetic beauty as the end 00:25:17.259 --> 00:25:20.259 result of fundamental quantum processes. Exactly. 00:25:20.880 --> 00:25:22.819 And toward the very end of his life, he even 00:25:22.819 --> 00:25:25.200 moved into biological structures. In the 1960s, 00:25:25.200 --> 00:25:27.640 right? Yes. In the 60s, he turned to understanding 00:25:27.640 --> 00:25:29.940 the physiology of human vision and the colors 00:25:29.940 --> 00:25:32.619 of flowers, setting the pigments he called fluorochromes. 00:25:32.960 --> 00:25:35.200 His intellectual journey, if you look at it, 00:25:35.240 --> 00:25:37.740 it's this unified line from detecting subtle 00:25:37.740 --> 00:25:40.539 sound vibrations to discovering how light interacts 00:25:40.539 --> 00:25:42.660 with molecular vibrations to produce a spectral 00:25:42.660 --> 00:25:44.700 fingerprint, to spending the rest of his life 00:25:44.700 --> 00:25:46.839 analyzing how those physical interactions manifest 00:25:46.839 --> 00:25:49.200 as the beautiful colors we see in the sea, in 00:25:49.200 --> 00:25:52.160 gems, and in nature. It's the science of visible 00:25:52.160 --> 00:25:54.720 quantum mechanics. It's clear that C .V. Rahman 00:25:54.720 --> 00:25:58.099 possessed a towering, unified intellect. However, 00:25:58.279 --> 00:26:00.839 to truly understand his legacy and the infrastructure 00:26:00.839 --> 00:26:04.299 he built, we have to address Section 6, the difficult 00:26:04.299 --> 00:26:07.599 genius. The sources paint a picture of a man 00:26:07.599 --> 00:26:09.680 whose brilliance was frequently overshadowed 00:26:09.680 --> 00:26:12.380 by profound institutional conflict and personal 00:26:12.380 --> 00:26:15.359 antagonism. That is absolutely correct. His career 00:26:15.359 --> 00:26:18.180 is a classic case study of how genius can be 00:26:18.180 --> 00:26:22.359 both highly productive and deeply destructive 00:26:22.359 --> 00:26:24.920 institutionally. And we can start with the Nobel 00:26:24.920 --> 00:26:27.559 itself and the priority dispute with the Russian 00:26:27.559 --> 00:26:30.519 physicists. Gregory Landsberg and Leonid Mandelstam, 00:26:30.619 --> 00:26:33.500 what was their timeline and their claim? So Landsberg 00:26:33.500 --> 00:26:35.380 and Mandelstam, working at Moscow State University, 00:26:35.799 --> 00:26:38.400 independently observed the effect in quartz crystals. 00:26:38.579 --> 00:26:40.859 And the timeline is razor thin. How close? Later, 00:26:40.900 --> 00:26:42.539 evidence suggested they observed the shifted 00:26:42.539 --> 00:26:45.960 spectral lines on February 24, 1928. Which is 00:26:45.960 --> 00:26:48.539 roughly one week before Raman's definitive confirmation 00:26:48.539 --> 00:26:51.579 on February 28. Exactly. They published their 00:26:51.579 --> 00:26:54.059 initial findings in July 1928 and were subsequently 00:26:54.059 --> 00:26:56.980 nominated alongside Raman for the 1930 prize. 00:26:57.279 --> 00:27:00.559 Yet the Nobel Committee awarded the prize solely 00:27:00.559 --> 00:27:03.740 to Raman. What were the technical reasons that 00:27:03.740 --> 00:27:06.259 underpin that decision beyond just the publication 00:27:06.259 --> 00:27:09.119 date? Well, the committee's analysis hinged on 00:27:09.119 --> 00:27:12.319 several key factors. First, the Russians had 00:27:12.319 --> 00:27:14.839 observed the effect only in crystals, which have 00:27:14.839 --> 00:27:17.710 a highly regular structure. Ram and Krishnan 00:27:17.710 --> 00:27:20.190 immediately proved the universal applicability 00:27:20.190 --> 00:27:23.130 of the effect across gases, liquids, and solids. 00:27:23.369 --> 00:27:25.769 So his was a more general discovery. A more universal 00:27:25.769 --> 00:27:28.650 phenomenon, yes. Second, the Nobel Committee 00:27:28.650 --> 00:27:30.809 noted that the Russians in their initial publication 00:27:30.809 --> 00:27:33.950 actually cited Raman's earlier non -Nobel winning 00:27:33.950 --> 00:27:36.230 work on light scattering for the theoretical 00:27:36.230 --> 00:27:38.289 interpretation of their own lines. So they were 00:27:38.289 --> 00:27:40.410 building on his previous insights. In a way, 00:27:40.470 --> 00:27:44.259 yes. And third, Raman's immediate and broad application 00:27:44.259 --> 00:27:46.640 of the method to molecular physics was just deemed 00:27:46.640 --> 00:27:49.420 superior. The committee concluded that Raman 00:27:49.420 --> 00:27:51.740 had provided the more definitive and broadly 00:27:51.740 --> 00:27:54.660 applicable proof and interpretation. Now we have 00:27:54.660 --> 00:27:56.759 to address the most tragic footnote to this story, 00:27:57.000 --> 00:27:59.960 the role and fate of K .S. Krishnan, Raman's 00:27:59.960 --> 00:28:02.599 primary associate. Krishnan's contribution was 00:28:02.599 --> 00:28:04.960 absolutely integral. He was the one leading the 00:28:04.960 --> 00:28:07.559 benchwork experiments. He noted the initial modified 00:28:07.559 --> 00:28:10.980 scattering on January 7th. And he co -authored 00:28:10.980 --> 00:28:12.900 virtually all of the key discovery papers in 00:28:12.900 --> 00:28:16.200 1928. He was, by all accounts, a co -discoverer. 00:28:16.299 --> 00:28:19.140 He was. Yet he was never included in the Nobel 00:28:19.140 --> 00:28:21.730 nomination. And the relationship became deeply 00:28:21.730 --> 00:28:24.150 toxic later in life. What was the trajectory 00:28:24.150 --> 00:28:27.089 of that hostility? After Krishnan achieved success 00:28:27.089 --> 00:28:30.170 and recognition in his own right, Raman's antagonism 00:28:30.170 --> 00:28:33.490 just grew and grew. Krishnan described Raman's 00:28:33.490 --> 00:28:36.269 subsequent hostility toward him as the greatest 00:28:36.269 --> 00:28:39.670 tragedy of my life. Raman became openly vicious. 00:28:40.170 --> 00:28:43.210 Vicious? Even after Krishnan's death, he told 00:28:43.210 --> 00:28:45.549 a correspondent that Krishnan was, quote, the 00:28:45.549 --> 00:28:47.769 greatest charlatan I have known, and all his 00:28:47.769 --> 00:28:50.109 life he masqueraded in the cloak of another man's 00:28:50.109 --> 00:28:53.089 discovery. That's just incredibly cruel. The 00:28:53.089 --> 00:28:55.369 cruelty of that remark, directed at a former 00:28:55.369 --> 00:28:57.789 student and coworker who is so integral to his 00:28:57.789 --> 00:29:00.309 greatest achievement, it reveals a dark edge 00:29:00.309 --> 00:29:02.869 to Raman's personality, a profound insecurity 00:29:02.869 --> 00:29:05.920 about sharing credit. And that desire for singular 00:29:05.920 --> 00:29:08.859 recognition seemed to fuel his next major conflict, 00:29:09.200 --> 00:29:12.420 the decade -long intellectual feud with Max Born, 00:29:12.599 --> 00:29:15.799 the Raman Born controversy. This unfolded at 00:29:15.799 --> 00:29:18.839 the Indian Institute of Science. The ISC, Raman, 00:29:18.940 --> 00:29:21.440 as director, invited Max Born, another Nobel 00:29:21.440 --> 00:29:23.420 laureate who was fleeing Nazi persecution in 00:29:23.420 --> 00:29:27.329 Germany, to join ISC in 1933. The scientific 00:29:27.329 --> 00:29:30.250 core of their dispute was lattice dynamics. Let's 00:29:30.250 --> 00:29:32.329 define that term because it's critical for understanding 00:29:32.329 --> 00:29:34.430 the fight. Lattice dynamics is the fundamental 00:29:34.430 --> 00:29:37.309 study of how atoms vibrate within a crystal structure. 00:29:37.609 --> 00:29:40.430 These vibrations dictate critical material properties 00:29:40.430 --> 00:29:43.509 like heat capacity, thermal conductivity, sound 00:29:43.509 --> 00:29:45.769 propagation. So they were arguing over the very 00:29:45.769 --> 00:29:48.940 nature of solids. In a sense, yes. Born had developed 00:29:48.940 --> 00:29:51.539 a complex, very detailed theoretical model for 00:29:51.539 --> 00:29:54.599 these crystal vibrations. Raman, based on his 00:29:54.599 --> 00:29:57.380 spectroscopic observations, developed a competing, 00:29:57.539 --> 00:29:59.799 simpler theory. And this wasn't a gentlemanly 00:29:59.799 --> 00:30:01.779 debate, was it? It became a personal and professional 00:30:01.779 --> 00:30:06.279 war. It was vicious. Born's theory, relying on 00:30:06.279 --> 00:30:09.220 complex mathematical concepts, was generally 00:30:09.220 --> 00:30:11.980 accepted by the physics community as a more comprehensive 00:30:11.980 --> 00:30:15.250 and accurate model. particularly in explaining 00:30:15.250 --> 00:30:17.849 the thermal properties of crystals. But Raman 00:30:17.849 --> 00:30:20.549 was adamant that Born's model contradicted his 00:30:20.549 --> 00:30:23.069 own experimental evidence. Absolutely adamant. 00:30:23.130 --> 00:30:25.430 And what was the lasting damage of this dispute? 00:30:26.069 --> 00:30:28.930 Raman used his institutional power to suppress 00:30:28.930 --> 00:30:31.980 Born's theory. As the editor of the influential 00:30:31.980 --> 00:30:35.119 journal Current Science, Raman actively rejected 00:30:35.119 --> 00:30:37.480 papers that supported Born's view of lattice 00:30:37.480 --> 00:30:40.240 dynamics. He effectively blocked intellectual 00:30:40.240 --> 00:30:42.779 discourse on a foundational area of physics within 00:30:42.779 --> 00:30:45.700 India for years. Born later said he felt Raman 00:30:45.700 --> 00:30:48.220 considered him an enemy. He did. This episode 00:30:48.220 --> 00:30:51.039 really underscores Raman's fatal flaw, an inability 00:30:51.039 --> 00:30:53.240 to tolerate intellectual dissent, particularly 00:30:53.240 --> 00:30:55.480 when it challenged his own empirical observations. 00:30:55.920 --> 00:30:58.599 This intellectual rigidity seems to be mirrored 00:30:58.599 --> 00:31:01.210 in his institution. management at ISC, which 00:31:01.210 --> 00:31:03.950 led to his eventual forced resignation as director. 00:31:04.190 --> 00:31:07.930 His tenure was short and explosive. Rahman entered 00:31:07.930 --> 00:31:12.049 ISC in 1933 with a clear mandate to elevate science, 00:31:12.170 --> 00:31:15.009 but he drove the Institute's focus almost entirely 00:31:15.009 --> 00:31:17.690 toward physics research. To the detriment of 00:31:17.690 --> 00:31:19.849 other departments. Often to the detriment of 00:31:19.849 --> 00:31:22.170 other equally important departments like engineering 00:31:22.170 --> 00:31:24.910 and chemistry. He was criticized for behaving, 00:31:25.109 --> 00:31:28.230 quote, like a bull in a china shop, disrupting 00:31:28.230 --> 00:31:30.029 the established administrative and financial 00:31:30.029 --> 00:31:32.849 balance. So he just shifted the balance of power 00:31:32.849 --> 00:31:35.589 too aggressively. He did. A review committee 00:31:35.589 --> 00:31:38.950 was convened in 1936, which ultimately concluded 00:31:38.950 --> 00:31:41.089 that he had overreached his administrative mandate 00:31:41.089 --> 00:31:44.450 and had misused funds. He was forced to step 00:31:44.450 --> 00:31:46.849 down as director, though he was allowed to remain 00:31:46.849 --> 00:31:49.289 as a professor of physics. A major institutional 00:31:49.289 --> 00:31:52.269 rebuke. A huge one. It demonstrated that his 00:31:52.269 --> 00:31:54.130 individual genius could not always translate 00:31:54.130 --> 00:31:56.569 into successful leadership. Another deeply revealing 00:31:56.569 --> 00:31:59.529 anecdote concerns Kamala Sohni and Rahman's views 00:31:59.529 --> 00:32:02.150 on women in science. This is a critical anecdote 00:32:02.150 --> 00:32:04.529 that really provides nuance to his character. 00:32:05.049 --> 00:32:08.529 In 1933, Kamala Sohni, who had excelled in her 00:32:08.529 --> 00:32:10.730 studies, applied for a research fellowship at 00:32:10.730 --> 00:32:15.119 ISISC. Ron, as director, initially rejected her 00:32:15.119 --> 00:32:18.279 application flatly. And his reasoning was explicit 00:32:18.279 --> 00:32:22.059 and deeply sexist. Explicitly so. He believed 00:32:22.059 --> 00:32:24.400 that women were not considered competent enough 00:32:24.400 --> 00:32:27.019 to pursue research. That is just a staggering 00:32:27.019 --> 00:32:29.299 position for such a brilliant, forward -thinking 00:32:29.299 --> 00:32:31.579 scientist to hold. It's a profound contradiction. 00:32:32.569 --> 00:32:35.230 Sohoney, however, refused to accept this institutional 00:32:35.230 --> 00:32:38.750 bias. She resorted to a satyagra, a nonviolent 00:32:38.750 --> 00:32:41.390 protest, right outside his office until he conceded. 00:32:41.430 --> 00:32:44.029 So he eventually let her in. He did, but under 00:32:44.029 --> 00:32:46.710 humiliating stipulations. He forced her to work 00:32:46.710 --> 00:32:48.890 on a year's probation and required her to work 00:32:48.890 --> 00:32:51.130 outside of standard hours. She became the first 00:32:51.130 --> 00:32:53.769 woman admitted to the Institute in 1933. And 00:32:53.769 --> 00:32:56.039 what was her lasting impression of him? She later 00:32:56.039 --> 00:32:58.539 reflected, stating that while Rahman was undoubtedly 00:32:58.539 --> 00:33:01.279 a great scientist, he was very narrow -minded. 00:33:01.440 --> 00:33:03.839 I can never forget the way he treated me just 00:33:03.839 --> 00:33:06.259 because I was a woman. And her subsequent career, 00:33:06.380 --> 00:33:09.259 where she became a pioneering biochemist, proves 00:33:09.259 --> 00:33:11.920 that his judgment was not only prejudiced, but 00:33:11.920 --> 00:33:14.680 demonstrably wrong. Completely wrong. Moving 00:33:14.680 --> 00:33:17.579 to his political life, Rahman was publicly aggressive 00:33:17.579 --> 00:33:20.720 in his opposition to Prime Minister Jawaharlal 00:33:20.720 --> 00:33:23.920 Nehru's scientific policies. His political antagonism 00:33:23.920 --> 00:33:27.279 was fierce. Raman was a profound libertarian 00:33:27.279 --> 00:33:30.019 when it came to science. He detested centralized 00:33:30.019 --> 00:33:33.220 governmental control and these massive bureaucratic 00:33:33.220 --> 00:33:36.119 organizations like the Haba Atomic Research Center 00:33:36.119 --> 00:33:38.859 and the CSIR. He called them the Nirabhat Nagar 00:33:38.859 --> 00:33:41.680 effect. Yes, and he saw them as stifling, true, 00:33:41.940 --> 00:33:44.839 curiosity -driven genius. This conflict led to 00:33:44.839 --> 00:33:46.740 some truly theatrical displays of rebellion. 00:33:47.140 --> 00:33:50.500 It did. The sources recount two incredible physical 00:33:50.500 --> 00:33:52.779 acts that demonstrate his rage against the state. 00:33:53.119 --> 00:33:55.960 In one instance, he was so infuriated by Nehru's 00:33:55.960 --> 00:33:58.380 policies that he reportedly smashed a bus to 00:33:58.380 --> 00:34:00.599 the prime minister. And he smashed his own Bharat 00:34:00.599 --> 00:34:03.400 Ratna medallion. Even more dramatically, he shattered 00:34:03.400 --> 00:34:05.740 his own Bharat Ratna India's highest civilian 00:34:05.740 --> 00:34:08.519 honor, which he received in 1954 with a hammer. 00:34:09.159 --> 00:34:11.599 He viewed it as a symbol of a government whose 00:34:11.599 --> 00:34:14.639 science policies he despised. And he used his 00:34:14.639 --> 00:34:16.960 scientific showmanship to publicly embarrass 00:34:16.960 --> 00:34:20.179 Nehru during a visit to his institute. This is 00:34:20.179 --> 00:34:23.030 a classic Roman anecdote. During Nehru's visit 00:34:23.030 --> 00:34:26.110 to the Roman Research Institute in 1948, Nehru 00:34:26.110 --> 00:34:29.250 set up a display where pure copper and gold samples 00:34:29.250 --> 00:34:32.570 were shown side by side under ultraviolet light. 00:34:32.789 --> 00:34:36.250 Copper, due to its properties, glows with a much 00:34:36.250 --> 00:34:38.329 more brilliant, almost startling light under 00:34:38.329 --> 00:34:41.929 UV than gold does. Nehru was misled, and he pointed 00:34:41.929 --> 00:34:43.909 to the copper as the more beautiful gold sample. 00:34:44.110 --> 00:34:46.630 And Raman seized the moment for a political jab. 00:34:46.789 --> 00:34:49.449 He did. He stated sharply, Mr. Prime Minister, 00:34:49.670 --> 00:34:53.010 everything that glitters is not gold. It was 00:34:53.010 --> 00:34:54.449 a pointed critique of the government's tendency 00:34:54.449 --> 00:34:57.369 to prioritize flash over substance. That intense 00:34:57.369 --> 00:34:59.550 aversion to government interference extended 00:34:59.550 --> 00:35:01.590 directly to the funding of his own institute. 00:35:01.949 --> 00:35:04.889 Absolutely. When Nehru offered financial assistance 00:35:04.889 --> 00:35:07.769 to the Roman Research Institute, Roman flatly 00:35:07.769 --> 00:35:10.670 refused, maintaining the RI's independence. His 00:35:10.670 --> 00:35:12.900 rationale was simple. Czerny don't want this 00:35:12.900 --> 00:35:15.000 to become another government laboratory. He wanted 00:35:15.000 --> 00:35:17.219 autonomy and freedom from political mandate above 00:35:17.219 --> 00:35:20.019 all else. Finally, let's briefly consider his 00:35:20.019 --> 00:35:23.039 personal philosophy. The sources note his open 00:35:23.039 --> 00:35:26.239 agnosticism. He was openly agnostic, though he 00:35:26.239 --> 00:35:29.159 fiercely rejected being labeled an atheist. His 00:35:29.159 --> 00:35:31.599 views were informed by the philosophy of Advaita 00:35:31.599 --> 00:35:34.539 Vedanta and thinkers like Herbert Spencer. He 00:35:34.539 --> 00:35:36.860 saw science itself as the path to the divine. 00:35:37.139 --> 00:35:40.280 How did he define his belief? He said, If there 00:35:40.280 --> 00:35:42.420 is a God, we must look for him in the universe. 00:35:42.619 --> 00:35:45.320 If he is not there, he is not worth looking for. 00:35:45.480 --> 00:35:47.760 The growing discoveries in the science of astronomy 00:35:47.760 --> 00:35:50.800 and physics seem to be further and further revelations 00:35:50.800 --> 00:35:52.940 of God. And his final requests were consistent 00:35:52.940 --> 00:35:55.360 with that independence from tradition. Completely. 00:35:55.800 --> 00:35:58.179 Despite being born into a Tamil Brahmin family, 00:35:58.340 --> 00:36:01.119 he scorned a religious ritual. On his deathbed, 00:36:01.260 --> 00:36:03.679 he told his wife he requested a clean and simple 00:36:03.679 --> 00:36:06.639 cremation for me. No mumbo jumbo, please. He 00:36:06.639 --> 00:36:08.739 maintained his scientific, rational approach 00:36:08.739 --> 00:36:11.500 right to the very end. As we bring this deep 00:36:11.500 --> 00:36:14.699 dive to a close, C .V. Rahman's legacy is monumental. 00:36:15.079 --> 00:36:17.900 He's recognized globally. Knight Bachelor in 00:36:17.900 --> 00:36:21.980 1929, the Hughes Medal in 1930, the Parat Ratna, 00:36:22.139 --> 00:36:25.139 and the Lenin Peace Prize. But his institutional 00:36:25.139 --> 00:36:28.159 legacy forged in conflict is perhaps the most 00:36:28.159 --> 00:36:30.539 complex part of the story. His institutional 00:36:30.539 --> 00:36:32.679 achievements, founding the Indian Academy of 00:36:32.679 --> 00:36:35.000 Sciences and the Roman Research Institute, were 00:36:35.000 --> 00:36:36.860 absolutely critical to the development of indigenous 00:36:36.860 --> 00:36:39.820 Indian science. However, even his relationship 00:36:39.820 --> 00:36:41.820 with the international establishment remained 00:36:41.820 --> 00:36:44.659 volatile until the end. He remains the only Indian 00:36:44.659 --> 00:36:46.880 fellow of the Royal Society ever to have resigned. 00:36:47.199 --> 00:36:50.710 He did so in 1968. The exact reason is unrecorded, 00:36:50.730 --> 00:36:52.789 but it was likely a culmination of disagreements 00:36:52.789 --> 00:36:55.510 over peer review or a critical review of one 00:36:55.510 --> 00:36:58.230 of his later, perhaps more idiosyncratic manuscripts. 00:36:58.650 --> 00:37:00.849 The ultimate commemoration, however, is scientific, 00:37:01.130 --> 00:37:03.650 cementing his pivotal moment in time. Indeed. 00:37:03.929 --> 00:37:06.610 India celebrates National Science Day every year 00:37:06.610 --> 00:37:09.429 on February 28, specifically to commemorate the 00:37:09.429 --> 00:37:11.289 date of the definitive discovery of the Roman 00:37:11.289 --> 00:37:14.510 effect in 1928. That date is now woven into the 00:37:14.510 --> 00:37:16.929 national consciousness as a moment of great intellectual 00:37:16.929 --> 00:37:20.119 pride and achievement. And in his final instruction, 00:37:20.300 --> 00:37:23.239 just days before his death in November 1970, 00:37:23.760 --> 00:37:27.500 we see the institutional builder emerge one last 00:37:27.500 --> 00:37:30.820 time. Two days before he passed away, he called 00:37:30.820 --> 00:37:32.780 a former student to his bedside and he gave this 00:37:32.780 --> 00:37:36.300 final poignant instruction. Do not allow the 00:37:36.300 --> 00:37:38.619 journals of the academy to die, for they are 00:37:38.619 --> 00:37:40.760 the sensitive indicators of the quality of science 00:37:40.760 --> 00:37:42.960 being done in the country and whether science 00:37:42.960 --> 00:37:45.860 is taking root in it or not. He understood that 00:37:45.860 --> 00:37:48.219 true scientific health is measured not just by 00:37:48.219 --> 00:37:50.900 discoveries, but by the rigor and vitality of 00:37:50.900 --> 00:37:53.300 its published communication. And an incredible 00:37:53.300 --> 00:37:55.880 final focus on publication and discourse from 00:37:55.880 --> 00:37:58.119 a man who spent his life generating and articulating 00:37:58.119 --> 00:38:00.880 new knowledge. And this brings us to the final 00:38:00.880 --> 00:38:03.719 provocative thought for you, the learner. Romain 00:38:03.719 --> 00:38:06.340 dedicated significant portions of his life, from 00:38:06.340 --> 00:38:08.820 the acoustics of the tabla to the colors of fluorochromes, 00:38:08.820 --> 00:38:11.380 to relentlessly pursue the understanding of color 00:38:11.380 --> 00:38:13.820 and light -matter interaction. If the Raman effect 00:38:13.820 --> 00:38:16.559 proved, that light, when interacting with matter, 00:38:16.719 --> 00:38:20.079 yields a new, unique molecular fingerprint revealed 00:38:20.079 --> 00:38:22.900 through color and wavelength shifts, what does 00:38:22.900 --> 00:38:25.320 this lifelong scientific pursuit of visual beauty 00:38:25.320 --> 00:38:27.539 tell us about the ultimate entanglement between 00:38:27.539 --> 00:38:30.800 human aesthetic curiosity and fundamental quantum 00:38:30.800 --> 00:38:33.760 physics? He used simple beauty as the empirical 00:38:33.760 --> 00:38:36.119 guide to the most complex realities of the universe. 00:38:36.340 --> 00:38:38.500 It seems his entire career was an answer to the 00:38:38.500 --> 00:38:40.880 question, how does the quantum world manifest 00:38:40.880 --> 00:38:43.320 as visible poetry? Thank you for joining us for 00:38:43.320 --> 00:38:45.480 this deep dive into the complex and fascinating 00:38:45.480 --> 00:38:47.059 world of Sir C .V. Raman.