EMILIO SEGRE VISUAL ARCHIVE / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY EMILIO SEGRE VISUAL ARCHIVE / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY
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Ernest Ruska (1906-1988), German physicist. Ruska was born in Heidelberg, Germany, on 25 December 1906 and was educated in Munich and Berlin. In 1931, he used a magnetic coil to focus an electron beam, which began his development of the first electron microscope. By 1933, he had developed an electron microscope with a magnification of x12,000, far higher than a light microscope. In 1957, Ruska became Director of the Institute for Electron Microscopy, a post he held until his retirement in 1974. Photographed in 1986, the year that Ruska received the Nobel Prize for Physics.
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