|Born||16 March 1853
Bingen am Rhein
|Died||October 14, 1940
|Institutions||University of Bonn|
|Known for||helium in the Earth's atmosphere, spectra|
Heinrich Gustav Johannes Kayser (16 March 1853 – 14 October 1940) was a German physicist.
He 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.
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