different between absorptance vs absorbtivity

English

Circa 20th century, from absorption +? -ance.

(Received Pronunciation) IPA^(key): /?b?z??p.tn?s/
(US) IPA^(key): /æb?s??p.tn?s/, /æb?z??p.tn?s/, /?b?s??p.tn?s/, /?b?z??p.tn?s/, IPA^(key): /æb?s??p.tn?ts/, /æb?z??p.tn?ts/, /?b?s??p.tn?ts/, /?b?z??p.tn?ts/

absorptance (plural absorptances)

(optics, physics) Absorbed radiation and incident radiation in a ratio format; a measurement that shows how well a surface absorbs radiation. [First attested in the mid 20^th century.]

absorbtive +? -ity

absorbtivity (plural absorbtivities)

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