Planck's constant

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English

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Etymology

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Named for Max Planck (1858–1947), German theoretical physicist, who discovered it in 1900.

Proper noun

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Planck's constant

  1. (quantum mechanics) the constant of proportionality (symbol ), relating the energy and frequency of a photon (6.626×10−34 joule-second); also related to the indeterminacy limit in the Heisenberg uncertainty principle; the quantum of action

Translations

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