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.