transmission density vs photographic density

transmission density and photographic density both are nouns.

Word	Noun	Adjective	Verb	Adverb
transmission density	Yes	No	No	No
photographic density	Yes	No	No	No

As nouns, transmission density and photographic density are synonyms defined as:

transmission density and photographic density: (physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation

Other synonyms of transmission density include absorbance, optical density.

transmission density (noun)	photographic density (noun)
(physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation	(physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation