Photometry

Radiant intensity

I_e

W/sr

		x
W/sr

Φ_e

		x
W

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

		variables: I_e - radiant intensity (power of radiation source per unit of solid angle) Φ_e - radiation (or absorption) power, radiant flux Ω - solid angle