Calculate too:
Irradiance

Photometry

Irradiation

H_e

W/m²

		x
W/m²

S_r

m²

rad

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

		variables: H_e - radiant exposure, irradiation (radiated energy per unit of area of receiver surface) W - radiant energy of solid S_r - area of surface of radiation detector α - angle between direction of radiation propagation and normal to surface