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Planck's radiation law
noun
, Physics.
- the law that energy associated with electromagnetic radiation, 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.
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Word History and Origins
Origin of Planck's radiation law1
First recorded in 1905–10; named after M. K. E. Planck
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