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. % of the ultraviolet radiation that reaches the earth's surface is uva. other sources: there are also several artificial methods to produce uv rays such as from black light (wood's light), ultraviolet fluorescent lamps, ultraviolet leds, ultraviolet lasers, synchrotron radiation sources, argon and
. % of the ultraviolet radiation that reaches the earth's surface is uva. other sources: there are also several artificial methods to produce uv rays such as from black light (wood's light), ultraviolet fluorescent lamps, ultraviolet leds, ultraviolet lasers, synchrotron radiation sources, argon and...
https://www.icbse.com/projects/biology-project-on-ultraviolet-rays-qen