explain ultra violet rays? how it form?
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Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 nm (with a corresponding frequency around 30 PHz) to 400 nm (750 THz), shorter than that of visible light, but longer than X-rays.
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UV RAYS is produced by high temperature surfaces such as the sun a continuous spectrum and by atomic excitation in a gaseous discharge tube of wavelength...
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