Several measures of
light are commonly known as
intensity:
-
Radiant intensity, a radiometric quantity measured in watts per steradian (W/sr)
-
Luminous intensity, a photometric quantity measured in lumens per steradian (lm/sr), or candela (cd)
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Irradiance, a radiometric quantity, measured in watts per square meter (W/m2)
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Intensity (physics), the name for irradiance used in other branches of physics (W/m2)
-
Radiance, commonly called "intensity" in astronomy and astrophysics (W·sr−1·m−2)
See also
-
Brightness, the subjective perception elicited by the luminance of a source
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Luminance, the photometric equivalent of radiance (lm·sr−1·m−2)
-
Photometry (optics), measurement of light, in terms of its perceived brightness to the human eye
-
Radiometry, measurement of light, in absolute power units
-
Luminosity
Statistics
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