According to Beer's Law, what happens to absorbance when all light is absorbed by a solution?

According to Beer's Law, absorbance is directly related to the concentration of a solute, the path length of the sample, and the wavelength of light used. Specifically, when all light is absorbed by a solution, it indicates that no light is transmitted through the solution; therefore, the absorbance reaches its maximum value.

In this context, absorbance can be represented on a scale where 0% absorbance corresponds to no light being absorbed (maximum transmission), while 100% absorbance indicates that all light has been absorbed (no transmission). Since absorbance is commonly expressed as a ratio or a value between 0 and 1 (or 0% to 100%), when a solution absorbs all the incident light, it indeed represents 100% absorbance. This concept is critical in understanding how concentration and light absorption work in spectroscopy and other applications within biomedicine.