Wilhelm Lenz

Wilhelm Lenz (February 8, 1888 in Frankfurt-am-Main, Germany – April 30, 1957 in Hamburg, Germany) was a German physicist, most notable for his invention of the Ising model[1] and for his application of the Laplace-Runge-Lenz vector to the (old) quantum mechanical treatment of hydrogen-like atoms.[2]

In 1906, Lenz graduated from the Klinger-Oberralschule, a non-classical secondary school in Frankfurt-am-Main, and went to study mathematics and physics at the University of Göttingen. From 1908 to 1911, Lenz studied under Arnold Sommerfeld, at the University of Munich, and he was granted his doctorate[3] on March 2, 1911. Upon graduation, he stayed on at the University, became Sommerfeld’s assistant on April 1, 1911, and he completed his Habilitation on February 20, 1914, becoming a Privatdozent on April 4, 1914. During World War I, he served as a radio operator in France and was awarded the Iron Cross Second Class in 1916. From September 30, 1920, he was again an assistant to Sommerfeld at the University of Munich’s Institute of Theoretical Physics, and he was appointed to the title and rank of extraordinarius professor at the University, on November 11, 1920. On December 1, 1920 he became an extraordinarius professor at the University of Rostock. From 1921, until his retirement in 1956, he was at the University of Hamburg, as Ordinarius Professor of Theoretical Physics and Director of the Institute of Theoretical Physics.

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