IEVref:845-24-091ID:
Language:enStatus: Standard
Term: Napierian spectral absorbance, <of a homogeneous non-diffusing layer>
Synonym1: Napierian spectral internal transmittance density
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Synonym3:
Symbol: An(λ)
B(λ)
Definition: natural (Napierian) logarithm of the reciprocal of the spectral internal transmittance, τi(λ)

An(λ) = B(λ) = − ln τi(λ)

Note 1 to entry: The Napierian spectral absorbance has unit one.

Note 2 to entry: This entry was numbered 845-04-84 in IEC 60050-845:1987.


Publication date:2020-12
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