absorbance
n. C1 Advanced ab·sorbance
n. the amount of light or energy that a material takes in and does not let pass through.
n. the measure of the amount of light or other electromagnetic radiation that is absorbed by a material. Often expressed as a logarithmic ratio of the intensity of incident light to the intensity of transmitted light.
The scientist measured the absorbance of the solution.
High absorbance indicates that the material is very effective at trapping light or heat energy.
In spectroscopy, the absorbance of a sample is directly proportional to the concentration of the substance being analyzed, following the Beer-Lambert law.