Properties and Uses of Ultraviolet Rays

Physics

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Ultraviolet radiation

It covers wavelengths ranging from about down to . Ultraviolet (UV) radiation is produced by special lamps and very hot bodies. The sun is an important source of ultraviolet light. But fortunately, most of it is absorbed in the ozone layer in the atmosphere at an altitude of about 40 - 50 km.Due to its shorter wavelengths, UV radiations can be focused into very narrow beams for high precision applications such as LASIK (Laser Assisted In Situ Keratomileusis) eye surgery. UV lamps are used to kill germs in water purifiers.

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