Physics
Chemistry
Beer and Brewing

What is Beer's law?

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June 05, 2007 6:58AM

Beer's law says that absorbance of a molecule or solution is:
A = a*b*c
where A is the absorbance, "a" is the absorptivity (in units of per molar per cm, M-1 cm-1), "b" is the path length (in units of centimeters, cm), and "c" is the concentration (in units of molar, M). The absorptivity, is also commonly known as epsilon.
That means that the absorbance is linearly proportional to the thickness of the sample, the concentration of the absorbing medium, and the absorptivity, which is a measure of a given molecule's ability of absorb light.
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