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Credit: PHOTO (C) ESTATE OF FRANCIS BELLO/SCIENCE PHOTO LIBRARY
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Caption: Chen Ning Yang. Portrait of the Chinese-American physicist Chen Ning Yang (born 1922). In 1956, Yang and Tsung-Dao Lee showed that parity conservation (mirror-image symmetry) is violated in interactions via the weak nuclear force. This work won them the 1957 Nobel Prize for Physics. Yang and Lee also proposed that electron- and muon-type neutrinos are different, predicted the existence of the weak force carrier, the W boson, and indicated the existence of neutral weak currents. Photographed in 1956. ***** NO ADVERTISING USAGE IN CONSUMER OR TRADE MAGAZINES WITHOUT PRIOR WRITTEN APPROVAL *****
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Keywords: 1956, 1957, america, american, asian, black-and-white, carrier, chen ning, chinese, fundamental force, historical, history, male, man, mirror-image symmetry, monochrome, neutral weak current, neutrino, neutrinos, nobel laureate, office, parity conservation, particle particle, physicist, physics, portraits, prize, recipient, scientist, smile, smiling, standing, surname y, theoretical, theorist, theory, us, w boson, weak nuclear interaction, winner, yang
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