Look up absorptivity in Wiktionary, the free dictionary.

The term absorptivity has two meanings:

• In chemistry, it usually refers to Molar absorptivity : the constant ε used in the Beer-Lambert law, A = εcl, where A is the absorbance, c is the concentration of the solution, and l is the path length.
• In physics, the word is used interchangeably with absorptance : the fraction of radiation absorbed at a given wavelength.

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.