extinction coefficient

The sum of the absorption coefficient and the scattering coefficient. [From Weik '89]

 Say it 
(a) Compare with molar absorptivity and absorbance .The absorbance of a solution per unit of path length and per unit concentration; a = A/(bc) where a, A, b, and c are the absorptivity, absorbance, path length, and concentration, respectively. Absorptivity varies with wavelength of the incident light.

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B: (Fisika) koefisien punahan
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