reflective power vs ratio

reflective power and ratio both are nouns.

Word	Noun	Adjective	Verb	Adverb
reflective power	Yes	No	No	No
ratio	Yes	No	No	No

As nouns, ratio is a hypernym of reflective power; that is, ratio is a word with a broader meaning than reflective power:

reflective power: the ratio of reflected to incident light
ratio: the relative magnitudes of two quantities (usually expressed as a quotient)

reflective power (noun)	ratio (noun)
the ratio of reflected to incident light	the relation between things (or parts of things) with respect to their comparative quantity, magnitude, or degree
	the relative magnitudes of two quantities (usually expressed as a quotient)