Planck–Einstein relation

Energy-frequency relation in quantum mechanics

Also known as Planck relation · Planck-Einstein relation

Instance of: physical law

Overview

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The Planck relation is a fundamental equation in quantum mechanics which states that the photon energy E is proportional to the photon frequency ν : The constant of proportionality, h, is known as the Planck constant. Several equivalent forms of the relation exist, including in terms of angular frequency ω: where the reduced Planck constant is .

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Defining formula: E=h\nu
In defining formula: E symbol represents: energy
h symbol represents: Planck constant
\nu symbol represents: frequency
Named after: Max Planck
Albert Einstein

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Source last edited June 5, 2026. AIDB refreshes this page daily.

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AIDB. (2026). Planck–Einstein relation (Q12757333). Retrieved from https://aidb.si/e/planck-einstein-relation-Q12757333