EMILIO SEGRE VISUAL ARCHIVES / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY EMILIO SEGRE VISUAL ARCHIVES / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY
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Swiss-German theoretical physicist Albert Einstein (1879-1955, left) with the Austrian-Swiss theoretical physicist Wolfgang Ernst Pauli (1900-1958, right). Einstein received the 1921 Nobel Prize in Physics for work on the photoelectric effect. However, he is best known for his paper on the special theory of relativity, which resulted in the famous equation E=mc2. Pauli worked on quantum mechanics. He described the exclusion principle, now named after him, in 1924, and put forward a fourth quantum number 's', to define the spin of an electron. The Pauli exclusion principle explains the main features of the periodic table of elements and of the structure of atoms. This work won him the 1945 Nobel Prize for Physics. Photographed in Leiden,.
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