Radiance: Difference between revisions

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Radiance is a term in radiometry. It is defined as:

$L={\frac {d^{2}\Phi }{dAd\Omega cos\theta }}$

Where $\Phi$ is radiant flux, $A$ is an area, and $\Omega$ is a solid angle.

Typical units are $[{\frac {W}{m^{2}sr}}]$ where "sr" means steradians.

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    L = \frac{d^2\Phi}{dA d\Omega cos \theta}
 </math>
+Where <math>\Phi</math> is [[Radiant flux|radiant flux]], <math>A</math> is an area, and <math>\Omega</math> is a [[solid angle]].
 Typical units are <math>[\frac{W}{m^2 sr}]</math> where "sr" means [[Steradian|steradians]].