Heinrich Kayser

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Heinrich Kayser
Born Heinrich Gustav Johannes Kayser
(1853-03-16)16 March 1853
Bingen am Rhein
Died 14 October 1940(1940-10-14) (aged 87)
Citizenship German
Fields Physicist
Institutions University of Bonn
Known for Helium in the Earth's atmosphere, spectra
Notable awards ForMemRS[1]

Heinrich Gustav Johannes Kayser ForMemRS[1] (German: [ˈkaɪzɐ]; 16 March 1853 – 14 October 1940) was a German physicist. [2]


Kayser was born at Bingen am Rhein. Kayser's early work was concerned with the characteristics of acoustic waves. He discovered the occurrence of helium in the Earth's atmosphere. Together with Carl Runge, he examined the spectra of chemical elements. In 1905, he wrote a paper on electron theory.

The kayser unit, associated with wavenumber, of the CGS system was named after him. He died at Bonn in 1940.



  1. ^ a b Herzberg, Gerhard (1955). "Heinrich Kayser 1853-1940". Biographical Memoirs of Fellows of the Royal Society 1: 135–126. doi:10.1098/rsbm.1955.0010. 
  2. ^ Matthias Dörries and Klaus Hentschel (eds.), Heinrich Kayser, Erinnerungen aus meinem Leben. Institut für Geschichte der Naturwissenschaft, Munich, 1996. ISBN 3-89241-019-4.