Planck's Constant Definition

Planck's constant relates a photon's energy to its frequency.
Planck's constant relates a photon's energy to its frequency. Aeriform / Getty Images

Planck's Constant Definition: Planck's constant is the proportionality constant relating a photon's energy to its frequency.

Planck's constant is expressed by the symbol h

h = 6.62606896(33) x 10-34 J·sec
h = 4.13566733(10) x 10−15 eV·sec

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Helmenstine, Anne Marie, Ph.D. "Planck's Constant Definition." ThoughtCo, Jul. 24, 2017, thoughtco.com/definition-of-plancks-constant-605523. Helmenstine, Anne Marie, Ph.D. (2017, July 24). Planck's Constant Definition. Retrieved from https://www.thoughtco.com/definition-of-plancks-constant-605523 Helmenstine, Anne Marie, Ph.D. "Planck's Constant Definition." ThoughtCo. https://www.thoughtco.com/definition-of-plancks-constant-605523 (accessed May 26, 2018).