Question

what is absorption coefficient​

Answer 1

The linear attenuation coefficient, attenuation coefficient, or narrow-beam attenuation coefficient characterizes how easily a volume of material can be penetrated by a beam of light, sound, particles, or other energy or matter.

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Answer 2

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Absorption coefficient is 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"

Experimentally, the absorption coefficient (α) can be calculated from this simple relation:

• α = 1/t ln [(1-R)^2 / T]

• absorption coefficient (α) = 2.303 A / t.

• αhν = A (hν - Eg )n

• hν(eV) = 1240 / [incident wavelength (nm)]

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