https://doi.org/10.1351/goldbook.A00028
Logarithm of the ratio of incident to transmitted
radiant power
through a sample (excluding the effects on cell walls). Depending on the base of the logarithm a decadic and Napierian absorbance are used. Symbols: A, A10, Ae. This quantity is sometimes called
extinction
, although the term
extinction
, better called
attenuance
, is reserved for the quantity which takes into account the effects of
luminescence
and
scattering
as well.
Source:
Green Book, 2nd ed., p. 32 [Terms] [Book]
See also:
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2169 [Terms] [Paper]
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2226 [Terms] [Paper]