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 physicist Albert Einstein (1879-1955, centre-left) with Swiss mathematician Marcel Grossman (1878-1960, left), Gustav Geissler (centre-right) and Eugene Grossmann (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. Grossman was a friend and classmate of Albert Einstein, and it was he who emphasised the importance of a non-Euclidean geometry (Riemannian, elliptic, geometry) to Einstein, which was a necessary step in the development of Einstein's general theory of relativity. Photographed in Thalwil, Switzerland.
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