Photon Definition

fōtŏn
photons
noun
A subatomic particle, having energy and momentum but no mass or electric charge, that is the quantum unit of electromagnetic radiation, including light.
Webster's New World
A unit of retinal illumination equal to the illumination from a surface having a brightness of one candle per sq meter seen through a pupil area of one sq millimeter.
Webster's New World

(physics) The quantum of light and other electromagnetic energy, regarded as a discrete particle having zero rest mass, no electric charge, and an indefinitely long lifetime. It is a gauge boson.

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Other Word Forms of Photon

Noun

Singular:
photon
Plural:
photons

Origin of Photon

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