absorptivity

IPA: ʌbzˈɔrptˈɪvʌti

The quality of being absorptive; absorptiveness.
(thermodynamics) The fraction of radiation absorbed by a surface to the total radiation incident on the surface.
(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.

Examples of "absorptivity" in Sentences

The absorptivity is the fraction of incident light power that is absorbed by the body/surface.
Ice has a very high reflectivity and a very low absorptivity in the wavelengths of solar radiation.
Note that absorptivity and emissivity are properties of objects - they do not imply any particular absorption or emission.
It might be that you have recently recognized that absorptivity, emissivity and scattering is dependent on the wavelenght.
This is independent whether we consider a black or a gray emitter because the special case of the absorptivity equal to unity is included.
Hycrete Admixtures transform concrete from an open network of capillaries and cracks into an ultra-low absorptivity, waterproof, protective building material.
The hint is that the absorptivity of the glass in the IR is roughly unity as is that of the black cardboard, and therefore their IR emissivity is also unity in the IR by Kirchoff's law.
This limit of absorptivity is important because some skeptics argue that, between water vapor and CO2, every available ray of IR within the absorption ranges of CO2 is already being absorbed.