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the world > matter > physics > electromagnetic radiation > heat > [noun] > emission or diffusion > energy produced by > as flow (5)
flux1863

Physics. The rate of flow of any fluid across a given area; the amount which crosses an area in a given time; it is thus a vector referred to…

radiant power1863

the ability to radiate heat, or light; (Physics) the power of radiated energy; spec. = radiant flux n.

radiant flux1896

a flux of radiant energy; (Physics) the rate of flow of radiant energy.

radiance1917

Physics. The flux of radiation emitted per unit solid angle in a given direction by unit area of a source.

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