infrared emission vs infrared radiation

infrared emission and infrared radiation both are nouns.

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

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

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

Other synonyms of infrared emission include infrared, infrared light.

infrared emission (noun)	infrared radiation (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