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molar absorptivity
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Molar absorptivity
The molar absorption coefficient, molar extinction coefficient, or molar absorptivity, is a measurement of how strongly a chemical species absorbs light at a given wavelength. It is an intrinsic property of the species; the actual absorbance, A, of a sample is dependent on the pathlength, l, and the concentration, c, of the species via the Beer–Lambert law, 
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molar absorptivity
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molar absorptivity
{شيمى}: ضريب جذب مولى
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molar absorptivity (molar extinction coefficient; molar absorption cross section)
(
) Compare with absorptivity and absorbance .The absorbance per centimeter of path length when the concentration of absorbing material is 1 M; = A/(bc) where a, A, b, and c are the molar absorptivity, absorbance, path length in cm, and concentration in mol/L, respectively. Molar absorptivities are sometimes written as absorption cross sections by expressing the concentration in units of mol/cm3, so that the molar absorptivity takes on units of cm2/mol.
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