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Photometry

Radiant intensity

Radiant intensity

radiant intensity (power of radiation source per unit of solid angle)

I_e =

W/sr

		x
W/sr

radiation (or absorption) power, radiant flux

Φ_e =

W

		x
W

solid angle

Ω =

sr

		x
sr
□°

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