(countable and uncountable, plural ultraviolet lights)
- (uncountable) Light in the ultraviolet part of the spectrum.
- (countable) Light bulb that emits ultraviolet light; see black light.
ultraviolet light - Computer Definition
An invisible band of radiation at the upper end of the visible light spectrum. With wavelengths from 10 to 400 nm, ultraviolet (UV) starts at the end of visible light and ends at the beginning of X-rays. The primary source of ultraviolet light is the sun, and most of the UV that reaches earth is in the lower-frequency, longer-wavelength Ultraviolet "A" region (see below). Although ultraviolet (UV) light is widely known as a disinfectant, it is also used to erase EPROM chips. After several minutes of exposure to UV light, the chip can be programmed again (see EPROM). Wavelength in Ultraviolet Region Nanometers (nm) Long Wave "A" UVA 315-400 Medium Wave "B" UVB 280-315 Short Wave "C" UVC 100-280 Near NUV 300-400 Middle MUV 200-300 Far FUV 122-200 Vacuum VUV 10-200 Extreme EUV 10-121 Deep DUV Below 300