Astrophysics (index)about

irradiance

(power reaching a surface)

Irradiance is the amount of electromagnetic radiation per unit time (power) striking a surface per unit area, from any direction. It is conceptually the sum of the intensity (i.e., radiance) from all directions.


(measure,EMR)
http://en.wikipedia.org/wiki/Irradiance

Referenced by:
insolation
radiative flux
Solar Maximum Mission (SMM)
watt (W)

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