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absorption coefficient

Wikipedia English The Free Encyclopedia

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Attenuation coefficient
For "attenuation coefficient" as it applies to electromagnetic theory and telecommunications see propagation constant. For the "mass attenuation coefficient", see the article mass attenuation coefficient.
Attenuation coefficient or narrow beam attenuation coefficient of the volume of a material characterizes how easily it can be penetrated by a beam of lightsoundparticles, or other energy or matter. A large attenuation coefficient means that the beam is quickly "attenuated" (weakened) as it passes through the medium, and a small attenuation coefficient means that the medium is relatively transparent to the beam. The SI unit of attenuation coefficient is the reciprocal metre (m-1). Extinction coefficient is an old term for this quantity, but still used in meteorology and climatology

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WordNet 2.0 Dictionary

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absorption coefficient

Noun
1. a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber; "absorptance equals 1 minus transmittance"
(synonym) coefficient of absorption, absorptance
(hypernym) coefficient


Telecommunication Standard Terms Dictionary

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absorption coefficient
A measure of the attenuation caused by absorption of energy that results from its passage through a medium. [After 2196] Note 1: Absorption coefficients are usually expressed in units of reciprocal distance. Note 2: The sum of the absorption coefficient and the scattering coefficient is the attenuation coefficient.

Free English-Vietnamese Dictionary

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absorption coefficient
absorption coefficient
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    Dizionario inglese-italiano 1.0.012

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    ABSORPTION COEFFICIENT
    COEFFICIENTE DI ABSORBIMENTO


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