Definitions from Wiktionary (absorptivity)

▸ noun:  The quality of being absorptive; absorptiveness.
▸ noun:  (thermodynamics) The fraction of radiation absorbed by a surface to the total radiation incident on the surface.
▸ noun:  (analytical chemistry) The constant a in the Beer's law relation A = abc, where A is the absorbance, b the path length, and c the concentration of solution. Also known as absorptive power. Formerly known as absorbency index; absorption constant; extinction coefficient.
▸ Also see absorptivity



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