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Tsung Dao Lee (b.1926), Chinese-American physicist and Nobel Laureate. Lee moved to America in 1946, after winning a grant to study in Chicago. He then moved to Princeton, and later Columbia. In 1956, Lee and fellow physicist Chen Ning Yang showed that parity conservation (mirror-image symmetry) is violated in interactions involving the weak nuclear force. This won them the 1957 Nobel Prize for Physics. Lee and Yang also proposed that electron- and muon-type neutrinos are different, predicted the existence of the W boson as the carrier of the weak force, and indicated the existence of neutral weak currents. Photographed at CERN, Geneva, in 1968.
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