|
Name |
Units |
Definition |
| radiant flux | Watts (J/s or kg⋅m2⋅s−3) | rate of energy transfer by electromagnetic radiation |
| irradiance | W⋅m-2 | radiant flux divided by area through which it passes |
| monochromatic irradiance | W/(m²·µm) | irradiance per unit wavelength interval at wavelength lambda |
| radiance | W/(m²·sr) | irradiance per unit solid angle (steradian) |