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(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.
From photo- + -on.
If you have the Photon MG, use it because it stops Mantis for a bit.
What causes an excited atom or molecule to emit a photon?
What begins as a single gamma ray photon in the sun's core emerges at the surface as thousands of visible-light photons.
Consider a photon emitted by a galaxy a billion years ago, now caught on a photographic plate on Earth.
Photon torpedoes - what have explosive coffins got to do with photon torpedoes - what have explosive coffins got to do with photons?
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