BROOKHAVEN NATIONAL LABORATORY / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY BROOKHAVEN NATIONAL LABORATORY / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY
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Tsung-Dao Lee's calculations. Lee (born 1926) is a Chinese-American physicist. In 1956, Lee and Chen Ning Yang 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. These calculations are on a doodle pad used by Lee as he worked with Yang in the summer of 1956 at Brookhaven National Laboratory, USA. Lee and Yang also made several other important advances in particle physics.
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