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The Bethe-Feynman efficiency formula, a simple method for calculating the yield of a fission bomb, was first derived in 1943 after development in 1942. - read more

Bethe–Feynman formula Feynman checkerboard Feynman diagrams ... Laurie M. Brown, ed. Selected Papers of Richard Feynman: With Commentary. 20th Century Physics ... - read more

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