Photometry



Radiance


Be
W/(sr·m2)
Φe
W
Ω
sr
Sem
m2
α
rad

1. Define values of all variables, besides sought quantity
2. Change units if necessary
3. Click "Calculate"




variables:

Be - radiance
Φe - radiation (or absorption) power, radiant flux
Ω - solid angle
Sem - area of surface of emitting source
α - angle between direction of radiation propagation and normal to surface



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