# 17-21-053

Ee, E

density of incident radiant flux with respect to area at a point on a real or imaginary surface

where Φe is radiant flux and A is the area on which the radiant flux is incident

Note 1 to entry: The corresponding photometric quantity is "illuminance". The corresponding quantity for photons is "photon irradiance".

Note 2 to entry: The irradiance is expressed in watt per square metre (W⋅m−2).

Note 3 to entry: This entry was numbered 845-01-37 in IEC 60050-845:1987.

Note 4 to entry: This entry was numbered 17-608 in CIE S 017:2011.

Publication date: 2020-12