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radiant flux

noun

, Physics.
  1. the time rate of flow of radiant energy.


radiant flux

noun

  1. the rate of flow of energy as radiation. It is measured in watts Φe
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of radiant flux1

First recorded in 1915–20

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radiant exitanceradiant heat