The linear attenuation coefficient is also inversely related to mean free path. Moreover, it is very closely related to the absorption cross section. ==Attenuation versus absorption== The terms `attenuation coefficient` and `absorption coefficient` are generally used interchangeably. However, in certain situations they are distinguished, as fo...
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http://en.wikipedia.org/wiki/Attenuation_coefficient
(from the article `telecommunications media`) ...of channel attenuation as the signal frequency is varied is known as the attenuation spectrum, while the average attenuation over the entire ...
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http://www.britannica.com/eb/a-z/a/122
real part of the propagation coefficient NOTE - For a transmission line the attenuation coefficient is the limit of the quotient of the relative change of a field quantity between two points on the axis by the distance between the points, when this distance tends to zero.
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=101-15-16
fraction of a parallel beam of specified radiation removed by attenuation in passing through a thin layer of thickness ?x of a substance divided by this thickness NOTE 1 - The attenuation coefficient is a function of the energy of the radiation. NOTE 2 - Depending on whether ?x is expressed in terms of length, mass per unit area amount of substan.....
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the real part of the propagation coefficient NOTE - The attenuation coefficient of a transmission line or waveguide is the limit of the attenuation between two points on the axis of the guide, divided by the distance between the points when this distance tends to zero.
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the real part of the propagation coefficient
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real part of the linear exponent of sound propagation NOTE - The unit is the neper per metre.
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=801-23-35
of a substance, for a parallel beam of specified radiation, the quantity µ in the expression µd? for the fraction of a radiation quantity removed by attenuation in passing through a thin layer dx of that substance. It is a function of the energy of the radiation. According as to whether dx is expressed in terms of length, mass per unit area,...
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=881-04-25
The factor relating transmission line  attenuation to unit distance.
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http://www.encyclo.co.uk/local/20510
1. <radiobiology> Compton: The fractional number of photons removed from a beam of radiation per unit thickness of material through which it is passing as a result of Compton effect interactions. ... 2. Linear: The fractional number of photons removed from a beam of radiation per unit thickness of material through which it is passing due to a...
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http://www.encyclo.co.uk/local/20973
Attenuation coefficient refers to the ratio that describes an energy or light beam's decrease in intensity as it passes through a given medium. The coefficient pertains directly to the ease with which the material is penetrated by the beam of energy. A low coefficient indicates that the given medium is close to transparent, while a higher number is...
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