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Planck's radiation law

noun, Physics.
the law that energy associated with electromagnetic radiation, as light, is composed of discrete quanta of energy, each quantum equal to Planck's constant times the corresponding frequency of the radiation: the fundamental law of quantum mechanics.
the law giving the spectral distribution of radiation from a blackbody.
Also called Planck radiation formula, Planck's law.
Origin of Planck's radiation law
First recorded in 1905-10; named after M. K. E. Planck Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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