ultraviolet

ultraviolet definition - computer

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


SPECTRUM.GIF


Ultraviolet in the Spectrum

The ultraviolet band comes after visible light and ends at the beginning of X-rays.






Computer Desktop Encyclopedia THIS DEFINITION IS FOR PERSONAL USE ONLY
All other reproduction is strictly prohibited without permission from the publisher.
Copyright © 1981-2009 by Computer Language Company Inc. All rights reserved.

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