Planck constant

A form of Planck's constant — 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

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Meanings

proper nounthe Planck constant
  1. alternativeAlternative form of Planck's constant.
Cite this entry
APA

Planck constant. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Planck%20constant

MLA

“Planck constant.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Planck%20constant. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Planck constant,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Planck%20constant.

Source: Planck constant on Wiktionary, CC BY-SA 4.0.