The phenomenon of fluorescence is a photoluminescence process. In this process, short-wavelength electromagnetic waves in the ultraviolet or visible wavelength band are absorbed and then released as long-wavelength electromagnetic waves. magnetic waves are absorbed and then released in the form of long-wavelength electromagnetic waves. The latter usually falls in the visible range and is superimposed with The latter usually falls in the visible range and is superimposed on the regular reflected light, thus revealing a dazzling glow color.