Why does IR radiation emit heat but UV radiation doesn’t?

Question

I’m researching for a project about greenhouse gasses and I can’t find an answer on why this is. Please explain!!

In: Physics

Answer 1

It’s the other way round: hot things emit IR radiation and not UV. The reason is thar IR radiation is low energy enough that our earthly hot things can emit it; for a hot thing to emit UV, it must be astronomically hot, like a star or an electric welding torch.