absorptance

As a noun absorptance

is (optics|physics) absorbed radiation and incident radiation in a ratio format; a measurement that shows how well a surface absorbs radiation .

As an adjective undefined is

lacking a definition or value.

As nouns the difference between absorptivity and absorptance

is that absorptivity is the quality of being absorptive; absorptiveness while absorptance is absorbed radiation and incident radiation in a ratio format; a measurement that shows how well a surface absorbs radiation.

As nouns the difference between absorbtivity and absorptance

is that absorbtivity is the extent to which a material absorbs light while absorptance is (optics|physics) absorbed radiation and incident radiation in a ratio format; a measurement that shows how well a surface absorbs radiation .

As nouns the difference between taxonomy and absorptance

is that taxonomy is the science or the technique used to make a classification while absorptance is (optics|physics) absorbed radiation and incident radiation in a ratio format; a measurement that shows how well a surface absorbs radiation .

Absorbtance is a synonym of absorptance.

As nouns the difference between absorptance and absorbtance

is that absorptance is absorbed radiation and incident radiation in a ratio format; a measurement that shows how well a surface absorbs radiation while absorbtance is the ratio of the radiant flux absorbed by a body to that incident upon it.