photon(redirected from x-ray photon)
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The elementary particle of light and other electromagnetic radiation; the quantum of electromagnetic energy. The photon is the massless, neutral vector boson that mediates electromagnetic interactions.
(Atomic Physics) a quantum of electromagnetic radiation, regarded as a particle with zero rest mass and charge, unit spin, and energy equal to the product of the frequency of the radiation and the Planck constant
a quantum of electromagnetic radiation, usu. considered as an elementary particle that is its own antiparticle and that has zero rest mass and charge and a spin of one.
The smallest unit of light or other electromagnetic energy, having no mass and no electric charge. Photons behave both as particles and waves. See Note at electromagnetic radiation.
A unit or quantum of electromagnetic radiation.
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|Noun||1.||photon - a quantum of electromagnetic radiation; an elementary particle that is its own antiparticle|
gauge boson - a particle that mediates the interaction of two elementary particles