Definitions for radianceˈreɪ di əns
This page provides all possible meanings and translations of the word radiance
radiance, glow, glowing(noun)
the amount of electromagnetic radiation leaving or arriving at a point on a surface
radiance, radiancy, shine, effulgence, refulgence, refulgency(noun)
the quality of being bright and sending out rays of light
an attractive combination of good health and happiness
"the radiance of her countenance"
the quality of being radiant, shining, bright or splendid
Girt with omnipotence, with radiance crowned. uE000197485uE001 Milton.
the flux of radiation emitted per unit solid angle in a given direction by a unit area of a source
Origin: From radiare + -ance
alt. of Radiancy
Radiance and spectral radiance are measures of the quantity of radiation that passes through or is emitted from a surface and falls within a given solid angle in a specified direction. They are used in radiometry to characterize diffuse emission and reflection of electromagnetic radiation. In astrophysics, radiance is also used to quantify emission of neutrinos and other particles. The SI unit of radiance is watts per steradian per square metre, while that of spectral radiance is W·sr−1·m−2·Hz−1 or W·sr−1·m−3 depending on if the spectrum is a function of frequency or of wavelength.
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