# 17-21-030

relative spectral distribution

S(λ)

quotient of the spectral distribution, Xλ(λ), of a radiant, luminous or photon quantity, X(λ), and a fixed reference value, R, which can be an average value, a maximum value or an arbitrarily chosen value of this distribution

Note 1 to entry: The relative spectral distribution has unit one.

Note 2 to entry: This entry was numbered 845-01-18 in IEC 60050-845:1987.

Note 3 to entry: This entry was numbered 17-1084 in CIE S 017:2011.

Publication date: 2020-12