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photon
Definitions
[ˈfəʊtɒn], (Noun)
Definitions:
- a particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass
Phrases:
Origin
:
early 20th century: from Greek phōs, phōt- ‘light’, on the pattern of electron
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definition by Oxford Dictionaries