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Light Frequency Linked to Electron Energy

Einstein distinguished brightness from frequency by predicting that raising the frequency of incident light increases the energy of individual photoelectrons rather than merely increasing their number.

Albert Einstein in a 1912 portrait
Albert Einstein, 1912. Photograph by J. F. Langhans — public domain. Wikimedia Commons source.
Year 1905BernPhysics

Light Frequency Linked to Electron Energy

1905 · Bern · Switzerland · Physics

Einstein distinguished brightness from frequency by predicting that raising the frequency of incident light increases the energy of individual photoelectrons rather than merely increasing their number.