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Area Lighting / Emission, optical properties of materials

IEV ref845-04-85

Symbol
αn(λ)

en
Napierian spectral absorption coefficient (of a homogeneous non-diffusing layer)
quotient of the Napierian logarithm of the reciprocal of the spectral internal transmittance τi(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 )= ln τ i ( λ ) l = log 10 τ i ( λ ) l ln10= A n ( λ ) /l MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=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@60CA@


[SOURCE: 845-04-84]


fr
d'absorption spectral népérien (d'un milieu homogène non diffusant) adj
quotient du logarithme népérien de l'inverse du facteur de transmission interne spectral τi(λ) d'une couche du milieu par la longueur l du trajet d'un faisceau de rayonnement traversant cette couche

a n ( λ )= ln τ i ( λ ) l = log 10 τ i ( λ ) l ln10= A n ( λ ) /l MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=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@60CA@


[SOURCE: 845-04-84]


ar
معامل الإمتصاص الطيفي النابسري (لطبقة متجانسة غير منتشرة)

de
spektraler natürlicher Absorptionskoeffizient (einer homogenen, nicht streuenden Schicht), m

es
coeficiente de absorción espectral neperiano

fi
spektrinen luonnollinen absorptiokerroin

it
coefficiente neperiano spettrale di assorbimento (di uno strato omogeneo non diffondente)

ko
네이피어 분광 흡수계수, 동질 비확산 층
자연대수 분광 흡수계수, 동질 비확산 층

ja
自然対数分光吸収係数, <均質な非拡散層の>

no
nb napieriansk spektral absorpsjonskoeffisient

nn neperisk spektral absorpsjonskoeffisient

pl
wskaźnik pochłaniania naturalny widmowy (warstwy jednorodnej nierozpraszającej)

pt
coeficiente de absorção espectral neperiano (de um meio homogéneo não difusor)

Publication date: 1987
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