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单词 photon
释义

WordReference Random House Learner's Dictionary of American English © 2024
pho•ton /ˈfoʊtɑn/USA pronunciation   n. [countable]
  1. Physicsa unit of measure of electromagnetic radiation.

WordReference Random House Unabridged Dictionary of American English © 2024
pho•ton  (fō′ton),USA pronunciation n. 
  1. Physicsa quantum of electromagnetic radiation, usually considered as an elementary particle that is its own antiparticle and that has zero rest mass and charge and a spin of one. Symbol: γ  Also called light quantum. 
  • phot- + -on1 1900–05

Collins Concise English Dictionary © HarperCollins Publishers::
photon /ˈfəʊtɒn/ n
  1. 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
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更新时间：2025/7/23 17:44:39