What is b in Beer-Lambert Law?

In the Beer-Lambert Law, b typically refers to the path length (l), which is the distance the light travels through the absorbing solution. The symbol b is sometimes used interchangeably with l in some texts, but they both represent the same concept: the length of the sample through which light passes, measured in centimeters. This factor influences how much light is absorbed, as a longer path length increases absorbance.