Biography:Philipp Lenard

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Philipp Lenard
Lenard in 1905
Lenard in 1905
Born 7 June 1862
Pressburg, Kingdom of Hungary, Austrian Empire
Died 20 May 1947
Messelhausen, Allied-occupied Germany


Known for Cathode rays; photoelectric effect
Awards Nobel Prize in Physics (1905)

Philipp Lenard (1862-1947) was a physicist known for experimental work on cathode rays and the photoelectric effect. He received the 1905 Nobel Prize in Physics.

Photoelectric effect

Lenard studied how light ejects electrons from metal surfaces and how the emitted electrons depend on light frequency and intensity. These experiments became central evidence for Albert Einstein's light-quantum explanation of the photoelectric effect.

Lenard's scientific work belongs to the experimental history of electrons, photons, and early quantum theory. His later political activity and support for Deutsche Physik are separate from the physical results.

References


Author: Harold Foppele