Planck's constant
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English
Etymology
Named for Max Planck (1858–1947), German theoretical physicist, who discovered it in 1900.
Proper noun
- (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
constant
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