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The attenuation coefficient describes the extent to which the radiant flux of a beam is reduced as it passes through a specific material. It is used in the context of: X-rays or gamma rays, where it is denoted μ and measured in cm −1;
The attenuation coefficient can be used to determine total attenuation in dB in the medium using the following formula: Attenuation = α [ dB MHz ⋅ cm ] ⋅ ℓ [ cm ] ⋅ f [ MHz ] {\displaystyle {\text{Attenuation}}=\alpha \left[{\frac {\text{dB}}{{\text{MHz}}{\cdot }{\text{cm}}}}\right]\cdot \ell [{\text{cm}}]\cdot {\text{f}}[{\text{MHz}}]}
- 1.64
- 6.9
- 0.2
- 9.94
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What is attenuation coefficient?
What is the difference between absorption coefficient and attenuation coefficient?
What is the unit of mass attenuation coefficient?
What is the attenuation coefficient at 418 nm?
The mass attenuation coefficient, or mass narrow beam attenuation coefficient of a material is the attenuation coefficient normalized by the density of the material; that is, the attenuation per unit mass (rather than per unit of distance).
In chemistry, the molar absorption coefficient or molar attenuation coefficient (ε) is a measurement of how strongly a chemical species absorbs, and thereby attenuates, light at a given wavelength. It is an intrinsic property of the species.
References. External links. Electromagnetic absorption by water. Absorption spectrum ( attenuation coefficient vs. wavelength) of liquid water (red), [1] [2] [3] atmospheric water vapor (green) [4] [5] [6] [4] [7] and ice (blue line) [8] [9] [10] between 667 nm and 200 μm. [11] .
In acoustics, acoustic attenuation is a measure of the energy loss of sound propagation through an acoustic transmission medium. Most media have viscosity and are therefore not ideal media. When sound propagates in such media, there is always thermal consumption of energy caused by viscosity.
The Molar attenuation coefficient (also called "molar absorptivity"), which is the absorption coefficient divided by molarity (see also Beer–Lambert law) The mass attenuation coefficient (also called "mass extinction coefficient"), which is the absorption coefficient divided by density
