Ultraviolet radiation

Ultraviolet radiation (UV; sometimes called ultraviolet light) is electromagnetic radiation of wavelengths of 100–400 nanometers, shorter than that of visible light, but longer than X-rays. Wavelengths between 10 and 100 nanometers are called extreme ultraviolet and share some properties with soft X-rays. UV radiation is present in sunlight and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs, Cherenkov radiation, and specialized lights, such as mercury-vapor lamps, tanning lamps, and black lights.

region of Earth's stratosphere that absorbs most of the Sun's UV radiation

tanning using an artificial source of ultraviolet light

observational astronomy performed over the ultraviolet range from 10 nm to 400 nm

thumb|Blacklight fluorescent tubes. The violet glow of a blacklight is not the UV light itself, but visible light that escapes being filtered out by the filter material in the glass envelope.

type of thin-film solar cell

Ultraviolet C light-emitting device

ultraviolet light therapy treatment

disinfection method that uses short-wavelength ultraviolet light to kill or inactivate microorganisms

ultraviolet source

photochemical curing by ultraviolet light

photo-oxidation of polymers