Question

Does cat urine glow under black light?

Answer 1

Yes, cat urine will glow under black light due to the presence of phosphors in the urine. This is because cat urine contains chemicals called purines and pyrimidines, which are fluorescent molecules that absorb ultraviolet light and then emit it as visible light.

Answer 2

You can use a black light to detect body fluids. It's actually a good way to look for pet urine or make sure a bathroom or hotel room is really clean. Cat urine, in particular, glows very brightly under ultraviolet light. Urine glows under a black light primarily because it contains the element phosphorus.