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The Impact Of Uv Rays On Humans . Uvc rays, on the other hand, never actually make it to the earth’s surface (the ozone layer blocks ’em), so the only uvc light humans are exposed to is artificial, according to the fda. Carotenoids in our skin and bloodstream could help to protect us from the harmful impact of radiation. SunGod Revolts Custom Ski and Snowboard Goggles by SunGod from www.kickstarter.com Uv radiation has a shorter wavelength and a higher energy level than visible light, while ir radiation has a longer wavelength and a weaker energy level. Uvc rays, on the other hand, never actually make it to the earth’s surface (the ozone layer blocks ’em), so the only uvc light humans are exposed to is artificial, according to the fda. The use of uv filters has increased recently due to growing concern about uv radiation and skin cancer, especially as a result of ozone depletion, which in turn has caused concern for its environmental impact.