Planck's constant

English

Etymology

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

Pronunciation

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Proper noun

Planck's constant

  1. (quantum mechanics) the constant of proportionality (symbol ℎ), 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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