light beam vs visible light

light beam and visible light both are nouns.

Word	Noun	Adjective	Verb	Adverb
light beam	Yes	No	No	No
visible light	Yes	No	No	No

As nouns, visible light is a hypernym of light beam; that is, visible light is a word with a broader meaning than light beam:

light beam: a column of light (as from a beacon)
visible light: (physics) electromagnetic radiation that can produce a visual sensation

Other hypernyms of light beam include light, visible radiation.

light beam (noun)	visible light (noun)
a column of light (as from a beacon)	(physics) electromagnetic radiation that can produce a visual sensation