system
Given the following post, respond as if you're commenting on Reddit:
human
Does a simple fire emit ultraviolet light? lf no, then how does our sun do so? Ks it a matter of thermonuclear fusion, or something else?
gpt
The light radiated by a hot object has a central maximum at a wavelength determined by its absolute temperature and intensity falls off on both sides with a characteristic shape. In principle UV will be present at any temperature but at low temperatures very little. The atoms at the sun surface are very hot and so emit a lot of UV.