-
- Radiant energy is “total # of hits” anywhere in the scene over the complete duration of the scene
- This quantity captures the total energy/* of all the photons hitting the scene
- Unit: Joules (J)
-
- Energy per second (power)
- Unit: Joules per second (
) = Watts ( )
-
- Energy per unit area
- Unit: Joules per square meter (
)
-
Irradiance/Radiant Exitance
- flux per unit area incident on a surface
- Unit: Watts per square meter (
) - Irradiance: flux arriving a surface
- Radiant Exitance: flux leaving a surface
-
- Power per unit area, per steradian (solid angle unit)
- Unit (
) - It is the solid angle density of irradiance