|
We are creating the world's most trusted encyclopedia and knowledge base.
|
Irradiance
From Citizendium, the Citizens' Compendium
Irradiance is a term in radiometry. It is defined as the change in flux over the change in area:
Typical units are [
]. Irradiance typically varies as a function of wavelength.
The term "exitance" is used when talking about the irradiance leaving a surface. (E.g. the exitance from an area source).

