Absorbance is defined as , with as absorbance -LRB- Beer-Lambert law -RRB- and indicates degree of transparency -LRB- , the ratio of light intensity exiting the sample to that of the incident light -RRB- to a given wavelength of light .

Absorbance is defined as , with as absorbance -LRB- Beer-Lambert law -RRB- . It is a measure of a given substance 's transparency -LRB- , the ratio of light intensity passing through sample to that of the incident light -RRB- to a given wavelength of light .
