# 17-24-121

opaque medium

medium that transmits no apparent radiation in the spectral range of interest due to absorption or diffusion of the incident radiation flux

Note 1 to entry: This entry was numbered 845-04-110 in IEC 60050-845:1987.

Note 2 to entry: This entry was numbered 17-842 in CIE S 017:2011.

Publication date: 2020-12