In 1931, electromagnetic lenses helped scientists see a world ordinary microscopes could ...

In 1931, physicists Knoll and Ruska unveiled the first electron microscope, revolutionizing science by using magnetic lenses ...
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April 20, 1940: Electron Microscope Crosses the Atlantic; Zworykin Crosses the Delaware

1940: Vladimir Zworykin, better known as a co-inventor of television, demonstrates the first electron microscope in the United States. Once again, the Russian emigré improves but does not, strictly ...