configuration factor, <between two surfaces>
quotient of the irradiance or illuminance,
Note 1 to entry: The relation between the configuration factor,
Note 2 to entry: The configuration factor has unit one.
Note 3 to entry: This entry was numbered 845-09-72 in IEC 60050-845:1987.
Note 4 to entry: This entry was numbered 17-246 in CIE S 017:2011.