Planck's constant
noun
variants
or less commonly Planck 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 joule seconds
—symbol h
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“Planck's constant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Planck%27s%20constant. Accessed 1 Dec. 2024.
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Planck's constant
noun
: 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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