Electromagnetic radiation with wavelength longer than that of x-rays but shorter than that of visible light, wavelengths range from 1x10-9m to 400x10-9m. Ultraviolet light can break some chemical bonds and cause cell damage.
Used for exposing photoresist in making semiconductor devices.
- UV-A 315-400nm
- UV-B 280-315nm
- UV-C 100-280nm
Most UV-B from the sun is absorbed by stratospheric ozone. Increased exposure to UV-B radiation suppresses the immune system and can have other adverse effects on living organisms.