Radiant exitance

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Notion

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Science and technology

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What Wikipedia says

In radiometry, radiant exitance or radiant emittance is the radiant flux emitted by a surface per unit area, whereas spectral exitance or spectral emittance is the radiant exitance of a surface per unit frequency or wavelength, depending on whether the spectrum is taken as a function of frequency or of wavelength.

Excerpt from the Wikipedia article “Radiant exitance”, under the CC BY-SA 4.0 license. Read the article on Wikipedia