Likes The first third.

Transcript context

…is like a wobbly balloon of water. And then you see why a neutron just falling into the nucleus would make it wobble around even more and in one of its configurations, it might take a dumbbell shape. And then you'd have basically two charged atoms just barely connected, trying to push each other apart. And often enough, they went the whole way. When they did that, these two new elements, half the weight of uranium, way down the periodic table, would reconfigure themselves into two separate nuclei. And in doing so, they would release some energy. And that was the energy that came out of the reaction and there was a lot of energy. So Bohr thought about the model in the right way. The chemists who actually discovered nuclear fusion didn't know what they were gonna get. They were just bombarding a solution of uranium nitrate with neutrons thinking, well, maybe we can make a new element, maybe a first man-made element will come out of our work. So when they analyzed the solution after they bombarded it, they found elements halfway down the periodic table. They shouldn't have been there. And they were totally baffled. What is this doing here? Do we contaminate our solution? No. They had been working with a physicist named Lisa Meitner who was a theoretical physicist, an Austrian Jew. She had gotten out of Nazi Germany not long before. But they were still in correspondence with her. So they wrote her a letter. I held that letter in my hand when I visited Berlin and I was in tears. You don't hold history of that scale in your hands very often. And it said in German — “We found this strange reaction in our solution. What are these elements doing there that don't belong there?” And she went for a walk in a little village in Western Sweden with her nephew, Otto Frisch, who was also a nuclear physicist. And they thought about it for a while and they remembered Bohr's model, the wobbly water-filled balloon. And they suddenly saw what could happen. And that's where the news came from, the physics news as opposed to the chemistry news from the guys in Germany that was published in all the Western journals and all the newspapers. And everybody had been talking about, for years, what you could do if you had that kind of energy. A glass of this material would drive the Queen Mary back and forth from New York to London 20 times and so forth, your automobile could run for months. People were thinking about what would be possible if you had that much available energy. And of course, people had thought about reactors. Robert Oppenheimer was a professor at Berkeley and within a week of the news reaching Berkeley, one of his students told me that he had a drawing on the blackboard, a rather bad drawing of both a reactor and a bomb. So again, because the energy was so great, the physics was pretty obvious. Whether it would actually happen depended on some other things like could you make it chain react? But fundamentally, the idea was all there at the very beginning and everybody jumped on it. The book is actually the best history of World War II I've ever read. It's about the atomic bomb, but it's interspersed with the events that are happening in World War II, which motivate the creation of the bomb or the release of it, why it had to be dropped on Japan given the Japanese response. The first third is about the scientific roots of the physics and it's also the best book I've read about the history of science in the early 20th century and the organization of it. There's some really interesting stuff in there. For example, there was a passage where you talk about how there's a real master apprentice model in early science where if you wanted to learn to do this kind of experimentation, you will go to Amsterdam where the master of it is residing. It's much more individual focused. Yeah, the whole European model of graduate study, which is basically the wandering scholar. You could go wherever you wanted to and sign up with whoever was willing to have you sign up.…

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