Pratique du Shadowing: Oppenheimer Wrote One Letter About Feynman — It Changed His Life - Apprendre l'anglais à l'oral avec la vidéo
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245 phrases
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In November 1943, the man in charge of building the atomic bomb stopped to write a job reference.
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Not to a general, not to Washington.
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He was running
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Los Alamos, thousands of people, a secret city, built from scratch in the New Mexico desert.
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The most important and most tightly classified scientific project in the history of the world.
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And in the middle of that, he took the time to sit down and write to a university physics department about a job.
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The man he was recommending was 25 years old and had published almost nothing the outside world would recognize.
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The letter still exists.
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One line from it has been quoted ever since.
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And the people it was sent to did nothing about it.
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The man writing was Robert Oppenheimer.
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The letter went to Raymond Burge, the chairman of the physics department at the University of California, Berkeley.
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Oppenheimer's own old department, the place where he had taught before the war, pulled him out to the desert.
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And the young man he was writing about was Richard Feynman.
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To understand why that letter is strange, you have to understand who Feynman actually was at that point,
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because it was not much of anything the public could see.
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He had finished his doctorate at Princeton the year before, in 1942.
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He was good.
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His teachers knew he was good.
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But he was a fresh
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Ph .D., one of thousands of capable young physicists in the country,
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with no great discovery to his name and no reputation outside the small rooms where theoretical physicists argue with each other.
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Early in 1943, he was pulled out to Los Alamos while the laboratory was still half -built,
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roads unpaved, buildings going up around the scientists as they worked.
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He was put into the theoretical division, the group doing the hardest mathematics on the project, and that division was run by Hans Bethe.
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And this is where something happened that doesn't usually happen to a 25 -year -old.
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Beto was one of the senior men in physics.
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He would later win the Nobel Prize for working out how the sun produces its energy.
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At Los Alamos, he needed people who could tear an idea apart
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and find the flaw in it before the project spent six months chasing it.
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He started talking through problems with Feynman, and he found that this young man would argue back,
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would stand in his office and tell him he was wrong, loudly, and then turn out to be right often enough that
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Beta kept coming back for more.
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The two of them worked out a method together for calculating how powerful a fission bomb would be,
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a piece of work that still carries both their names.
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Feynman was handed a group of his own to run.
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By one account, he became the youngest group leader in the entire laboratory.
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He was also, on the side, picking the locks on the filing cabinets where the most secret documents in the country were kept,
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not to steal anything, but to prove the locks were useless
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and to irritate the officers who were sure the secrets were safe.
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That was the person Oppenheimer was writing about.
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Not a famous man, a 25 -year -old who argued with Nobel laureates and cracked government safes for sport,
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and whom the most senior people in the building had quietly decided was the best of all of them.
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So the letter was not a routine favor.
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It was the director of the Manhattan Project telling another institution, this one is worth your attention, and you should move before someone else does.
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Recommendation letters are usually careful things.
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You praise the candidate, you hedge a little, you leave yourself some room.
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Oppenheimer did not hedge.
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He wrote that Feynman was, in his words, by all odds the most brilliant young physicist there, and that everyone knew it.
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That last part is the tell.
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He wasn't offering an opinion for Burge to weigh against other opinions.
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He was reporting something the whole laboratory already agreed on, and telling Burge he was behind the curve.
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He even reminded Burge, in the letter, that he might already know the name, because Feynman had once applied for a fellowship at Berkeley.
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So Berkeley had crossed paths with him once before.
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Then Oppenheimer did something you almost never see in a letter like this.
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He didn't rest on his own word.
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He handed Burge two quotes from other men, and these were not ordinary men.
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The first was Betta, the same Betta who ran the theoretical division, who had Feynman working directly under him.
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Betta said he would rather lose any two other men from the project than lose Feynman.
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Sit with what that means.
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This was wartime, on a project where every single person had been handpicked from the best in the country, where losing anyone set the work back.
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Betta was saying, take two of my people, any two, before you take this one.
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The second quote was from Eugene Wigner.
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Another future Nobel laureate, one of the deepest and most precise thinkers in the field.
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Wigner said that Feynman was a second Dirac, only this time human.
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You have to know who Dirac was for that line to do its work.
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Paul Dirac was one of the strangest and most brilliant physicists who ever lived.
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He had written down an equation and.. from the mathematics alone, predicted that antimatter must exist,
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a mirror version of ordinary matter that nobody had ever seen.
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And then, a few years later, they found it, exactly as the equation said.
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That is almost the purest thing a physicist can do.
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He was also famous for being nearly impossible to talk to.
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He spoke so rarely, and so literally, that other physicists collected stories about him for decades.
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Dirac was the benchmark.
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He was the name you reached for when ordinary words for genius had run out, and Wigner was saying, Feynman belonged in that company,
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the same order of mind, except that you could actually have a conversation with him.
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So this is what sat on Raymond Burge's desk in the winter of 1943.
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The director of the Manhattan Project, the head of its theoretical division, and one of the great minds of the age, all independently, all in writing,
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all pointing at the same 25 -year -old and saying the same thing, above nearly everyone, before the world had the faintest idea who he was.
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What those three men had wasn't a crystal ball.
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It was a way of testing whether something in front of them actually held up, quickly, and without being fooled by a reputation or a title.
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I put the six questions Feynman used to do exactly that, taken from his own lectures and his own writing,
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into a short guide called The Feynman Field Guide to Clear Thinking.
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Linked below.
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Burge read the letter.
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And Berkeley did nothing.
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Not right away.
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Not slowly.
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Not eventually.
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The recommendation went nowhere.
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The most valuable endorsement in American physics landed on a department chairman's desk, and the chairman let it sit there.
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Why?
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For a long time, that was the quiet, unexplained part of the story.
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The physicist and writer Jeremy Bernstein, going back through the record years later, found that Oppenheimer had tried as early as 1943 to get
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Berkeley to bring Feynman in, and that the move was opposed by Burge.
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For some reason, is how Bernstein put it, the reason wasn't written down.
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What the record does show is that relations between Berg and Oppenheimer were strained, and that the chairman simply would not act.
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You can let a thing like that stay a mystery.
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Or you can look at who Raymond Burge was, and at another decision he made, which is not a mystery, because he explained it himself.
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A few years earlier, Oppenheimer had tried to bring a different man into the Berkeley department,
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Robert Serber, one of his own most gifted students and closest collaborators.
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Serber was Jewish.
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Burge blocked it, and in a letter to a colleague explaining himself, he wrote that one
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Jew in the department was enough.
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That is not an interpretation.
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That is what he wrote, and it sits in the histories and on the historical marker at Oppenheimer's old
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Berkeley building to this day.
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Feynman was Jewish too.
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I want to be careful here, because this channel does not do your thinking for you.
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Nobody wrote down Berger's reason for sitting on the Feynman letter.
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The line about one
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Jew being enough was about Serber, not about Feynman, and it would be dishonest to pretend otherwise.
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What I can give you is the two facts set down side by side, the way they sat on that desk.
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Oppenheimer sent Berkeley the strongest recommendation of his career.
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The man who received it had already, in his own hand, decided that a department could hold too many of a certain kind of person.
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And he did nothing with the letter in front of him.
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You have probably watched a version of this.
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Not this exact one, but the shape of it.
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Someone with the title, the final say, the name on the door, getting a judgment badly wrong,
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while the people actually doing the work could see it plainly and had no power to move it.
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If you have sat through that, I would like to hear about it.
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What was the job and who was your Burge?
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Here is where you might think you have the point of the story.
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A small, blinkered administrator misses a great talent out of prejudice or pride.
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A cautionary tale with a clear villain.
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That is part of it, but if you stop there, you have only half, because you would still be assuming the letter mattered,
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that if only Burge had acted on it, he would have handed Feynman his future, and the tragedy is that he dropped it.
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That has it backwards.
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The letter did not change Feynman's life, and that is the thing the title quietly takes away, even as it promises it.
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Because Feynman was fine, more than fine.
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While Berkeley sat on its hands, Hans Bethe, the same Bethe who said he would rather lose any two other men,
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simply decided that he wanted Feynman near him when the war was over.
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Bethe was a professor at Cornell.
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Cornell had taken him in as a refugee from Germany in 1935, and he stayed loyal to the place for the rest of his life.
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When the fighting ended, Bethe and his colleagues brought Feynman to Cornell and Feynman went gladly
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because he admired Batha and wanted to keep working beside him.
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There was a harder reason, too.
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Feynman's wife, Arlene, had tuberculosis.
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Through the Los Alamos years, she lived in a sanatorium a few hours away, and he drove out to see her when he could.
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She died in June of 1945, weeks before the first bomb was tested.
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When the war ended, he was a widower at 27, and what he wanted was not an institution bidding for him.
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He wanted to work next to a man he trusted.
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Beta was that man.
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By his own account, he had settled on Cornell before any competing offer could catch up.
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So the Berkeley recommendation was never the hinge it appears to be.
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It did not open a door, because the door that mattered was opened by a man who wanted Feynman personally
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and did not need a letter to tell him so.
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Oppenheimer's recommendation got Feynman nothing.
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Berkeley simply missed him, and that is exactly what makes the letter worth keeping.
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Not because it worked, but because it didn't, and it still turned out to be true in every line.
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Read it again with that in mind.
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Everything Oppenheimer wrote in 1943 was correct.
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The most brilliant, by all odds, and everyone knew it.
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Correct.
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A second Dirac, only human.
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Correct.
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And if anything, an understatement.
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In the years after the war, at Cornell, Feynman built a new way of handling the behavior of light and matter,
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of electrons and photons that had defeated everyone who came before him, including a way of drawing those interactions as simple pictures,
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lines, and squiggles on paper that physicists still use at the blackboard today.
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But here is a scene worth stopping on, because it says something the rest of the story doesn't.
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In the spring of 1948, 27 physicists gathered at a resort hotel in the Pocono Mountains
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of Pennsylvania at a meeting the National Academy of Sciences had called.
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It was not a public event.
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It was the inner circle of the field, in one room.
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Enrico Fermi was there.
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Niels Bohr was there, the man who had built the foundations of quantum theory.
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And Paul Dirac was there, the actual Dirac, the benchmark himself, the man Feynman had been measured against five years earlier,
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in a letter he never saw, sitting in the audience.
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Feynman got up and, for the first time in public, showed them his pictures and his method, and the room could not follow him.
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His approach had antimatter behaving like ordinary matter running backward through time,
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and it got the right answers by physical reasoning rather than by proving each step the way the others expected.
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Bohr thought the young man had forgotten something basic about quantum mechanics, and rose from his seat to correct him at the blackboard.
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Dirac kept pressing him on whether the method was even mathematically consistent, a question Feynman, who trusted it because it worked,
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could not answer to Dirac's satisfaction.
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Edward Teller raised an objection too.
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One by one, the founders of modern physics told him, in effect, that they did not see it.
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They admitted his answers were correct.
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They just could not accept how he was getting them.
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Feynman left the conference disappointed, by some accounts depressed, and went home to write the whole thing up properly instead.
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Hold that against the Burge story for a moment, because they are not the same failure, and the difference matters.
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At Pocono, the greatest physicists alive were wrestling in good faith with something genuinely new and genuinely hard,
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presented badly, late in a long day.
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Skepticism in that room was not a sin, it is how science is supposed to work.
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Within a few years, helped by a young mathematician named Freeman Dyson, who made the method legible to everyone else, the pictures Feynman drew that night,
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became the standard tool of the entire field.
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Even Oppenheimer, who had chaired the discussions, came around and conceded the point.
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The system corrected itself, because the people in it were trying to see.
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Burge was not trying to see.
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That is the whole distinction.
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He had nothing hard in front of him, no five -hour lecture, no half -finished theory.
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He had a clean, plain, one -page conclusion handed to him in writing by the three men in the country,
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best place to reach it, and he did nothing.
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The difference between Pocono and Berkeley is the difference between failing to understand a thing and refusing to look at it,
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which is why the 1943 letter is more remarkable, not less.
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In 1948, with the work in front of them, the founders of physics could not see what Feynman had.
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In 1943, with no work to look at, no diagrams, no
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Nobel, nothing but a young man arguing in a half -built laboratory.
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Oppenheimer and Beitha and Wigner saw all of it.
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They were years ahead of a room that contained Bohr and Dirac.
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And the one man who had their conclusion in his hand, in plain language, filed it away.
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So reckon up what actually happened.
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Feynman went on to share the Nobel Prize in 1965 for that work at Cornell.
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He moved to Caltech and rebuilt how physics was taught to a whole generation.
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And decades later, an old man by then, a television audience of millions,
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watched him sit at a government hearing into the loss of a space shuttle, take a clamped piece of the shuttle's own rubber sealing material,
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drop it into a glass of ice water, and show on camera that the cold had made it stiff.
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The single physical fact that explained why seven people had died.
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The same mind, still cutting straight to the thing that mattered, more than 40 years after the letter.
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All of it was visible in 1943.
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It was written down.
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It was signed by the three men best placed in the country to judge it.
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And it sat in a drawer at Berkeley
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while the man it described went off and did every single thing the letter said he would.
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We tend to assume that recognition is the hard part, that genius goes unseen, that the tragedy is nobody noticing in time.
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Feynman's story says something stranger.
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He was seen, completely, early, in writing, by precisely the right people.
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The recognition was flawless.
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The failure came one step later, at the desk of the man whose only job, in that moment, was to act on it.
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And those are two different things, being right and holding the authority to decide.
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Burge had the authority.
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He was the chairman.
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A little over a decade later, he would be elected president of the American Physical Society.
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The most senior post -American physics could hand a man, and the university would eventually carve his name over the door of a building.
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Beethy and Wigner and Oppenheimer had the judgment.
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When those two things point in opposite directions, it is not always the judgment that wins.
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It is often the title, because the title is the one holding the pen.
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Feynman spent the rest of his life worrying at that exact gap.
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He had no patience for authority that could not show its work,
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not out of rebellion, but because he refused to grant anyone the benefit of the doubt on the strength of their rank.
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A grand title, a confident manner, a committee stamp, none of it counted with him until he had checked the thing himself.
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You can read that as a personality quirk, or as a man who understood,
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better than most, how easily a correct answer dies on the desk of someone who outranks the people who are right.
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The letter is still here.
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You can find it reproduced in the biographies,
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quoted in articles, pulled out whenever someone wants to show how clearly the great physicists saw what was coming.
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It outlived every man who touched it.
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It outlived the decision it was written to change.
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At the University of California, Berkeley, there is a physics building.
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It was dedicated in 1964, and it carries a name above the door.
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The name is Burge Hall.
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It is named for Raymond Burge, the chairman, in honor of his long service to the department.
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Richard Feynman never worked at Berkeley.
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He went to Cornell and then to Caltech, and the letter that recommended him to Berkeley is still in the archive, the most brilliant young physicist,
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by all odds, and everyone knew it, sitting exactly where the man who received it set it down.
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Vocabulaire et conseils d’expression pour cette leçon
Cette leçon d’expression orale s’appuie sur la vidéo « Oppenheimer Wrote One Letter About Feynman — It Changed His Life ». Les mots qui reviennent le plus souvent : Feynman, letter, Burge, Berkeley. Cette vidéo contient 245 phrases et 3192 mots à répéter en shadowing. La partie parlée dure 17:55. Le locuteur parle à un rythme naturel d’environ 178 mots par minute, proche d’une conversation courante. 82 % des mots font partie des 3 000 mots les plus courants en anglais ; le reste mérite d’être vu avant de commencer.
Vocabulaire clé de cette vidéo
15 mots de la vidéo à retenir, avec leur prononciation et leur sens :
| Mot | Prononciation | Sens |
|---|---|---|
| physics nom | /ˈfɪz.ɪks/ | physique |
| desk nom | /dɛsk/ | bureau, pupitre |
| recommendation nom | /ˌɹɛkəmɛnˈdeɪʃən/ | recommandation |
| argue verbe | /ˈɑɹ.ɡju/ | affirmer, débattre |
| ordinary adjectif | /ˈɔɹdɪnɛɹi/ | ordinaire |
| laboratory nom | /ˈlæb(ə)ɹəˌtɔɹi/ | laboratoire |
| theoretical adjectif | /ˌθi.əˈɹɛt.ɪ.kəl/ | théorique |
| odd adjectif | /ɑd/ | bizarre, étrange |
| judgment nom | /ˈd͡ʒʌd͡ʒ.mənt/ | jugement |
| recognition nom | /ˌɹɛkəɡˈnɪʃ(ə)n/ | reconnaissance |
| reputation nom | /ˌɹɛpjʊˈteɪʃən/ | réputation, renommée |
| founder nom | /ˈfaʊ̯n.dəː/ | fondateur, fondatrice |
| mystery nom | /ˈmɪs.t(ə.)ɹi/ | mystère |
| badly adverbe | /ˈbæd.li/ | mal, mauvaisement |
| plain nom | /pleɪn/ | plaine |
Les verbes à particule que vous entendrez
| Mot | Prononciation | Sens |
|---|---|---|
| write down verbe | noter, écrire | |
| work out verbe | /ˌwɝk ˈaʊt/ | calculer |
| get up verbe | se lever | |
| go back verbe | rentrer, retourner | |
| go off verbe | exploser | |
| go up verbe | monter, s'élever | |
| hold up verbe | retenir | |
| pull out verbe | se retirer |
La grammaire de cette vidéo
Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :
| Structure | Dans la vidéo |
|---|---|
| Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le fait | has been quoted · was sent · was pulled |
| Propositions relatives who / which + proposition — une précision sur une personne ou une chose | people who could · made, which is · man who received |
| Present perfect have/has + participe passé — une action passée qui compte encore maintenant | has been quoted · have probably watched · have sat |
Prononciation à surveiller
Le locuteur utilise 7 contractions et formes réduites, comme wasn't, didn't, doesn't. Prononcez-les sous leur forme courte, telles que vous les entendez.
- Les sons « th »: theoretical /ˌθi.əˈɹɛt.ɪ.kəl/, mathematics /mæθ(.ə)ˈmæt.ɪks/, gather /ˈɡæðɚ/, mathematician /ˌmæθ.(ə.)məˈtɪʃ.ən/
- Les sons « sh » et « zh »: recommendation /ˌɹɛkəmɛnˈdeɪʃən/, recognition /ˌɹɛkəɡˈnɪʃ(ə)n/, reputation /ˌɹɛpjʊˈteɪʃən/, institution /ˌɪn.stɪˈtʃuː.ʃən/, conclusion /kənˈkluːʒən/
- Mots longs — placez bien l’accent: recommendation /ˌɹɛkəmɛnˈdeɪʃən/, ordinary /ˈɔɹdɪnɛɹi/, laboratory /ˈlæb(ə)ɹəˌtɔɹi/, theoretical /ˌθi.əˈɹɛt.ɪ.kəl/, recognition /ˌɹɛkəɡˈnɪʃ(ə)n/
Les sons difficiles pour les francophones :
- /h/ — il se souffle, il n’est pas muet: hedge /ˈhɛd͡ʒ/, nowhere /ˈnoʊ.(h)wɛɹ/, behave /bɪˈheɪv/
- /tʃ/ et /dʒ/ — à ne pas adoucir en « ch » et « j »: judgment /ˈd͡ʒʌd͡ʒ.mənt/, institution /ˌɪn.stɪˈtʃuː.ʃən/, genius /ˈd͡ʒin.jəs/, lecture /ˈlɛk.t͡ʃə/, tragedy /ˈtɹæd͡ʒ.ɪ.di/
- /r/ anglais — langue recourbée, sans frotter la gorge: recommendation /ˌɹɛkəmɛnˈdeɪʃən/, argue /ˈɑɹ.ɡju/, ordinary /ˈɔɹdɪnɛɹi/, laboratory /ˈlæb(ə)ɹəˌtɔɹi/, theoretical /ˌθi.əˈɹɛt.ɪ.kəl/
Comment s’entraîner avec cette vidéo
- Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
- Commencez à la vitesse 0,75×, répétez phrase par phrase, puis revenez à la vitesse normale quand cela devient facile.
- Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme physics, desk, recommendation.
Qu'est-ce que la technique du Shadowing ?
Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.