Sponsored by Electromagnetic radiation is divided into different types according to its wavelength.
Visible light is just a small part of the whole spectrum.
UV is normally used to describe radiation with wavelengths between about 100 and 400 nanometres. As with all electromagnetic radiation, the shorter the wavelength the greater the energy carried. However, it does cause sunburn and has been implicated in causing sun-induced premature ageing of skin and some cancers. This is the form of ultraviolet produced in most solariums. It also causes sunburn.