infrared light vs infrared emission

infrared light and infrared emission both are nouns.

Word	Noun	Adjective	Verb	Adverb
infrared light	Yes	No	No	No
infrared emission	Yes	No	No	No

As nouns, infrared light and infrared emission are synonyms defined as:

infrared light and infrared emission: electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves

Other synonyms of infrared light include infrared, infrared radiation.

infrared light (noun)	infrared emission (noun)
electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves	electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves