Assertion: radiance | /r/HasProperty | conserved
Facets:
value: in an optical system
type: LOCATION
Source sentences:
text: When radiance is conserved, as discussed above, the radiance emitted by a source is the same as that received by a detector observing it.
text: Radiance is a conserved quantity in an optical system so that radiance measured as watts per unit area per unit solid angle incident on a detector will not exceed the radiance at the emitter.