It is sometimes called Òextinction
coefficientÓ
A wavelength dependent constant for the species being analyzed
ÒeÓ is also used in some texts for ÒaÓ.
ÒaÓ or molar absorptivity (1/M.cm)
The diameter of the cuvette or sample holder which is
the distance the light travels
through the absorbing sample.
Becomes a constant when the same cuvette is used
for all samples.
ÒcÓ or concentration (M or mol/L)
Generally the main use of BeerÕs Law is to determine the
concentration of various solutions.