wave theory vs wave theory of light

wave theory and wave theory of light both are nouns.

Word	Noun	Adjective	Verb	Adverb
wave theory	Yes	No	No	No
wave theory of light	Yes	No	No	No

As nouns, wave theory and wave theory of light are synonyms defined as:

wave theory and wave theory of light: (physics) the theory that light is transmitted as waves

Other synonyms of wave theory include undulatory theory.

wave theory (noun)	wave theory of light (noun)
(physics) the theory that light is transmitted as waves	(physics) the theory that light is transmitted as waves