Planck's constant

noun
\ ˈpläŋ(k)s- How to pronounce Planck's constant (audio) , ˈplaŋ(k)s- How to pronounce Planck's constant (audio) \
variants: or less commonly Planck constant

Definition of Planck's constant

: a constant that gives the unvarying ratio of the energy of a quantum of radiation to its frequency and that has an exact value of 6.62607015 × 10−34 J·s symbol h

First Known Use of Planck's constant

1910, in the meaning defined above

History and Etymology for Planck's constant

Max K. E. L. Planck

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Time Traveler for Planck's constant

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The first known use of Planck's constant was in 1910

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Dictionary Entries Near Planck's constant

Planck

Planck's constant

Planck distribution law

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Statistics for Planck's constant

Cite this Entry

“Planck's constant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Planck%27s%20constant. Accessed 28 Nov. 2021.

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More Definitions for Planck's constant

Planck's constant

noun
\ ˈplaŋ(k)s- How to pronounce Planck's constant (audio) , ˈpläŋ(k)s- How to pronounce Planck's constant (audio) \

Medical Definition of Planck's constant

: a constant that gives the unvarying ratio of the energy of a quantum of radiation to its frequency and that has an approximate value of 6.626 × 10−34 joule second symbol h

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