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{{Short description|Physicist associated with the Franck-Hertz experiment}}
{{Short description|Physicist associated with the Franck-Hertz experiment}}
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Latest revision as of 23:02, 24 May 2026

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James Franck
Franck
Franck
Born 26 August 1882
Hamburg, Germany
Died 21 May 1964
Göttingen, West Germany


Known for Franck-Hertz experiment; quantized atomic excitation
Awards Nobel Prize in Physics (1925)

James Franck (1882-1964) was a German physicist known for the Franck-Hertz experiment, which gave experimental evidence for discrete atomic energy levels.

Franck-Hertz experiment

The Franck-Hertz experiment showed that atoms absorb energy in discrete amounts. Electrons passing through mercury vapor lost energy in steps corresponding to atomic excitation energies, supporting the quantum theory of atomic structure.

Franck shared the 1925 Nobel Prize in Physics with Gustav Hertz.

References


Author: Harold Foppele