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This work greatly simplified some of the calculations used to observe and predict such interactions. In the early s Feynman provided a quantum-mechanical explanation for the Soviet physicist Lev D. Landau's theory of superfluidity-- i.

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In he and the American physicist Murray Gell-Mann devised a theory that accounted for most of the phenomena associated with the weak force, which is the force at work in radioactive decay. Their theory, which turns on the asymmetrical "handedness" of particle spin, proved particularly fruitful in modern particle physics. And finally, in , while working with experimenters at the Stanford Linear Accelerator on the scattering of high-energy electrons by protons, Feynman invented a theory of "partons," or hypothetical hard particles inside the nucleus of the atom, that helped lead to the modern understanding of quarks.

Feynman's stature among physicists transcended the sum of even his sizable contributions to the field. His purely intellectual reputation became a part of the scenery of modern science. Feynman diagrams, Feynman integrals, and Feynman rules joined Feynman stories in the everyday conversation of physicists. Feynman's popular lecture series was published in The Feynman Lectures , while his personal side was captured in Surely You're Joking, Mr.

In the Pilot , Sheldon 's whiteboard features Feynman diagrams depicting the decay modes of the top quark in electroweak theory. In " The Jerusalem Duality ", one of the whiteboards in Sheldon's office features a multiloop Feynman integral for the self-energy of a massless system. In " The Einstein Approximation ", Sheldon finds a menial job as a busboy at The Cheesecake Factory so that his basal ganglia are occupied with a routine task, freeing his prefrontal cortex to work quietly in the background on his problem.

He drops a tray of plates and a nearby table claps, with Sheldon stating: "Is that really necessary? Good Lord. The interference pattern in the fracture The motion of the wave through the molecular structure They move through the graphene as a wave. In " The Large Hadron Collision ", Sheldon takes up Tuvan throat singing again after abandoning his goal to master it, akin to Feynman's goal. In " The Skank Reflex Analysis ", the apartment whiteboards near the entry way and behind Sheldon's desk feature Feynman diagrams illustrating the capacity of electrons to produce axions in very dense environments at high temperatures e.

He held the Richard C. Tolman professorship in theoretical physics at the California Institute of Technology. Feynman was a keen popularizer of physics through both books and lectures including a talk on top-down nanotechnology called There's Plenty of Room at the Bottom and the three-volume publication of his undergraduate lectures, The Feynman Lectures on Physics.

Feynman also became known through his semi-autobiographical books Surely You're Joking, Mr. Both were Lithuanian Jews. As an adult he spoke with a New York accent [6] [7] strong enough to be perceived as an affectation or exaggeration [8] [9] —so much so that his friends Wolfgang Pauli and Hans Bethe once commented that Feynman spoke like a "bum". From his mother, he gained the sense of humor that he had throughout his life. As a child, he had a talent for engineering, maintained an experimental laboratory in his home, and delighted in repairing radios.

When he was in grade school, he created a home burglar alarm system while his parents were out for the day running errands. When Richard was five his mother gave birth to a younger brother, Henry Phillips, who died at age four weeks. Though their mother thought women lacked the capacity to understand such things, Richard encouraged Joan's interest in astronomy, and Joan eventually became an astrophysicist.

Feynman's parents were not religious, and by his youth, Feynman described himself as an "avowed atheist ". He saw that it contained the original text in a little square on the page, and surrounding it were commentaries written over time by different people.

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In this way the Talmud had evolved, and everything that was discussed was carefully recorded, which made it a wonderful book. Despite being impressed, Feynman was disappointed with the lack of interest for nature and the outside world expressed by the rabbis, who only cared about questions which arise from the Talmud. A high-school-administered IQ test estimated his IQ at —high, but "merely respectable" according to biographer James Gleick. Years later he declined to join Mensa International , saying that his IQ was too low. I suspect that this test emphasized verbal, as opposed to mathematical, ability.

Feynman received the highest score in the United States by a large margin on the notoriously difficult Putnam mathematics competition exam Feynman's cognitive abilities might have been a bit lopsided I recall looking at excerpts from a notebook Feynman kept while an undergraduate I doubt Feynman cared very much about such things. When Feynman was 15, he taught himself trigonometry , advanced algebra , infinite series , analytic geometry , and both differential and integral calculus.

Feynman applied to Columbia University but was not accepted because of their quota for the number of Jews admitted. Noticing that he "had gone too far," he then switched to physics, which he claimed was "somewhere in between. Feynman had his revenge a few years later, when Heisenberg concluded an entire book on cosmic rays with the phrase: "such an effect is not to be expected according to Vallarta and Feynman. Vallarta knew why Feynman was grinning. The other was his senior thesis, on "Forces in Molecules", [31] based on an idea by John C.

Slater , who was sufficiently impressed by the paper to have it published.

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Today, it is known as the Hellmann—Feynman theorem. In , Feynman received a bachelor's degree , [33] and was named a Putnam Fellow. The head of the physics department there, Henry D. Smyth , had another concern, writing to Philip M. Morse to ask: "Is Feynman Jewish? We have no definite rule against Jews but have to keep their proportion in our department reasonably small because of the difficulty of placing them. Attendees at Feynman's first seminar, which was on the classical version of the Wheeler-Feynman absorber theory , included Albert Einstein , Wolfgang Pauli , and John von Neumann.

Pauli made the prescient comment that the theory would be extremely difficult to quantize, and Einstein said that one might try to apply this method to gravity in general relativity , [36] which Sir Fred Hoyle and Jayant Narlikar did much later as the Hoyle—Narlikar theory of gravity. This was Richard Feynman nearing the crest of his powers. At twenty-three It was not just a facility at mathematics though it had become clear Feynman seemed to possess a frightening ease with the substance behind the equations, like Einstein at the same age, like the Soviet physicist Lev Landau —but few others.

One of the conditions of Feynman's scholarship to Princeton was that he could not be married; nevertheless, he continued to see his high school sweetheart, Arline Greenbaum, and was determined to marry her once he had been awarded his Ph. This was an incurable disease at the time, and she was not expected to live more than two years. On June 29, , they took the ferry to Staten Island , where they were married in the city office.

The ceremony was attended by neither family nor friends and was witnessed by a pair of strangers.

Feynman could only kiss Arline on the cheek. After the ceremony he took her to Deborah Hospital , where he visited her on weekends. Wilson , who was working on means to produce enriched uranium for use in an atomic bomb , as part of what would become the Manhattan Project.

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This was done in a quite different manner from that used by the calutron that was under development by a team under Wilson's former mentor, Ernest O. Lawrence , at the Radiation Laboratory of the University of California. On paper, the isotron was many times more efficient than the calutron, but Feynman and Paul Olum struggled to determine whether or not it was practical. Ultimately, on Lawrence's recommendation, the isotron project was abandoned. At this juncture, in early , Robert Oppenheimer was establishing the Los Alamos Laboratory , a secret laboratory on a mesa in New Mexico where atomic bombs would be designed and built.

An offer was made to the Princeton team to be redeployed there. They were among the first to depart for New Mexico, leaving on a train on March 28, The railroad supplied Arline with a wheelchair, and Feynman paid extra for a private room for her. He administered the computation group of human computers in the theoretical division. He aided the engineers there in devising safety procedures for material storage so that criticality accidents could be avoided, especially when enriched uranium came into contact with water, which acted as a neutron moderator.

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He insisted on giving the rank and file a lecture on nuclear physics so that they would realize the dangers. He developed a series of safety recommendations for the various grades of enrichments. Returning to Los Alamos, Feynman was put in charge of the group responsible for the theoretical work and calculations on the proposed uranium hydride bomb , which ultimately proved to be infeasible.

He later discovered the reason: most of the other physicists were too much in awe of Bohr to argue with him. Feynman had no such inhibitions, vigorously pointing out anything he considered to be flawed in Bohr's thinking. He said he felt as much respect for Bohr as anyone else, but once anyone got him talking about physics, he would become so focused he forgot about social niceties. Perhaps because of this, Bohr never warmed to Feynman.

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At Los Alamos, which was isolated for security, Feynman amused himself by investigating the combination locks on the cabinets and desks of physicists. He often found that they left the lock combinations on the factory settings, wrote the combinations down, or used easily guessable combinations like dates. He left notes in the cabinets as a prank, spooking his colleague, Frederic de Hoffmann , into thinking a spy had gained access to them. Informed that Arline was dying, Feynman drove to Albuquerque and sat with her for hours until she died on June 16, Feynman claimed to be the only person to see the explosion without the very dark glasses or welder's lenses provided, reasoning that it was safe to look through a truck windshield, as it would screen out the harmful ultraviolet radiation.

The immense brightness of the explosion made him duck to the truck's floor, where he saw a temporary "purple splotch" afterimage. Feynman nominally held an appointment at the University of Wisconsin—Madison as an assistant professor of physics, but was on unpaid leave during his involvement in the Manhattan Project.

His appointment was not extended when he did not commit to returning. In a talk given there several years later, Feynman quipped, "It's great to be back at the only university that ever had the good sense to fire me.