IEC 60050 - International Electrotechnical Vocabulary


IEVref:	845-04-85	ID:
Language:	en	Status: Obsolete

Term:	Napierian spectral absorption coefficient (of a homogeneous non-diffusing layer)
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Symbol:	α_n(λ)
Definition:	quotient of the Napierian logarithm of the reciprocal of the spectral internal transmittance τ_i(λ) of a layer of the medium by the length l of the path of a beam of radiation traversing that layer $a_{n} (λ) = - \frac{ln τ_{i} (λ)}{l} = - \frac{{log}_{10} τ_{i} (λ)}{l} ln 10 = A_{n} (λ) / l$
Publication date:	1987
Source	845-04-84
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Internal notes:	2017-06-02: Cleanup - Remove Attached Image 845-04-85.gif
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