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单词 luminous flux
释义

WordReference Random House Unabridged Dictionary of American English © 2024
luminous flux, [Optics.]
  1. Opticsthe rate of transmission of luminous energy: expressed in lumens.
  • 1925–30

Collins Concise English Dictionary © HarperCollins Publishers::
luminous flux n
  1. a measure of the rate of flow of luminous energy, evaluated according to its ability to produce a visual sensation. For a monochromatic light it is the radiant flux multiplied by the spectral luminous efficiency of the light. It is measured in lumens
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