Kayser, Heinrich Gustav Johannes

Kayser, Heinrich Gustav Johannes

(hīn`rĭkh go͝os`täf yōhän`əs kī`zər), 1853–1940, German physicist. He was professor at Bonn from 1894 to 1920. He is known for his work in sound and, in association with C. D. T. Runge, in spectrumspectrum,
arrangement or display of light or other form of radiation separated according to wavelength, frequency, energy, or some other property. Beams of charged particles can be separated into a spectrum according to mass in a mass spectrometer (see mass spectrograph).
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 analysis. He wrote a handbook of spectroscopy (1901–12) and a treatise on the electron theory (1905).
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