# 17-24-087

spectral optical thickness, <of a medium>

spectral optical depth, <of a medium>

δ (λ)

integral of the spectral linear attenuation coefficient, μ(xλ), of the medium between the points x1 and x2, as given by the equation

Note 1 to entry: The spectral optical thickness is used in atmospheric physics and physical oceanography.

Note 2 to entry: The spectral optical thickness has unit one.

Note 3 to entry: This entry was numbered 845-04-80 in IEC 60050-845:1987.

Note 4 to entry: This entry was numbered 17-1226 and 17-1225 in CIE S 017:2011.

Publication date: 2020-12