Robert A. Millikan

Carl David Anderson and the Discovery of the Positron

Carl David Anderson and the Discovery of the Positron

On January 11, 1991, American physicist Carl David Anderson passed away. He is best known for his discovery of the positron in 1932, an achievement for which he received the 1936 Nobel Prize in Physics, and of the muon in 1936. “The atom can’t be seen, yet its existence can be proved. And it is simple to prove that it can’t ever be seen. It has to be studied by indirect evidence — and…
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Victor Franz Hess and the Cosmic Radiation

Victor Franz Hess and the Cosmic Radiation

On August 7, 1912, Austrian physicist Victor Franz Hess provided evidence of a high-altitude radiation in one of his balloon rides, which later was called cosmic radiation. Together with Carl Anderson, he received the 1936 Nobel Prize in Physics for the discovery of cosmic radiation. What causes Ionization of the Air? Victor Franz Hess was educated in Graz, Austria. There, he attended the grammar school and the University of Graz. At the Physical…
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