Meaning of “Planck's constant” in the English Dictionary

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"Planck's constant" in British English

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Planck's constantnoun [ S ]

/ˌplæŋks ˈkɒn.stənt/ us /ˌplæŋks ˈkɑːn.stənt/ specialized

a number that never changes and that expresses the relationship between the energy of a photon and its frequency

(Definition of “Planck's constant” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"Planck's constant" in American English

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Planck's constantnoun [ U ]

us /ˈplæŋks ˈkɑn·stənt, ˈplɑŋks-/

physics a number that never changes and that expresses the relationship between the energy of a photon and its frequency

(Definition of “Planck's constant” from the Cambridge Academic Content Dictionary © Cambridge University Press)