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 · Most ultraviolet (UV) light from the Sun is blocked by the atmosphere before making it to the surface, but the American Cancer Society points out that UV light is still the main cause of the damaging effects of sunlight on human skin In most circumstances, you'll hear a lot more about the dangers of UV light than any positive effects it has;Ultraviolet waves are used to identify materials by the glow or fluorescence under them They are used to make black lights May food and drug companies use germicidal lamps to disinfect various types of products, and their containers UV from Space The sun and lightening are celestial bodies that emit ultraviolet wavesUltraviolet astronomy became feasible with the advent of rockets capable of carrying instruments above Earth's atmosphere, which absorbs most electromagnetic radiation of ultraviolet wavelengths (ie, roughly 100 to 4,000 angstroms) from celestial sources Much radiation is lost even at the highest altitudes that balloons can re