Ernst Ruska was a German physicist who is best known for his pioneering work in the development of the electron microscope. Born on December 25, 1906, and passing away on May 4, 1988, Ruska's innovations laid the foundation for advances in microscopy that allowed scientists to observe structures at the nanoscale, far beyond the limits of traditional optical microscopes.
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A physicist.[ref]
Ernst Ruska by Technische Universität Berlin. Ernst Ruska: electron-optics research, microscope development and university career
The early two-stage electron microscope experiment investigates how magnetic electron lenses can form a magnified image. The electron microscope article distinguishes magnification from electron microscope resolution.
Statue of Ernst Ruska in Jena
. Statue of Ernst Ruska in Jena-Burgau, photographed by Adrio on 7 May 2024; the file does not identify the sculptor. Commons cites German freedom of panorama for the permanent public sculpture. Creative Commons Attribution-ShareAlike 4.0 International for photograph; Commons also cites German freedom of panorama for the permanent public sculpture., via Wikimedia Commons. Source.