Hans Friedrich Geitel

Hans Friedrich Geitel (* July 16, 1855 in Braunschweig, † August 15 1923 in Wolfenbüttel ) was a German physicist.

Life

Hans Geitel came through the relocation of his family, his father was a forester in 1861 to Blankenburg and grew up in close proximity to Julius Elster. He attended along with Elster school and high school. Between them a lifelong friendship developed by the two own interest in science came about a common field of activity.

The study both spent years in Heidelberg and Berlin. 1879 was Geitel in Braunschweig his teaching degree and took up a position as a teacher in Wolfenbüttel at the Great School of. 1881 succeeded Geitel, Julius Elster to get on the high school also. There, they intensified their joint research. Karlberg joke (1875-1958), who continued both studies, there was one with their students. In 1892 Geitel was elected a member of the Leopoldina.

Work

Geitel and Elster submitted work on meteorology, to nuclear physics and the photoelectric effect. Geitel recognized the decay law of radioactivity and 1899 coined the term atomic energy. In 1893 she invented the photocell.

Writings (selection )

• Elster, Julius and Geitel, Hans: Essays on Hyperphosphorescenz. Supplementary sheets to the annals of physics and chemistry, 21:455, 1897.
• Elster, Julius and Geitel, Hans: On the influence of a magnetic field on the Becquerel rays caused by the conductivity of the air. Negotiations of the German Physical Society, 1:136-138 May 1899.
• Elster, Julius and Geitel, Hans: About ozone formation in glowing platinum surfaces and the Eletrical conductivity of ozonized by phosphorus air. Annals of Physics and Chemistry, 275:321-331, 1890.
• Elster, Julius and Geitel, Hans: Essays on Becquerel rays. Annals of Physics and Chemistry, 302:735-740, 1898.

Awards

1899 honorary doctorate from the University of Göttingen, he was awarded in 1915 - along with Elster - the Technical University of Braunschweig.