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UV 1. Of or relating to electromagnetic radiation between violet visible light and x-rays in the electromagnetic spectrum, having frequencies between 790 terahertz and 30 petahertz and wavelengths between 380 nanometers and 10 nanometers. 2. Of or relating to a light bulb that emits ultraviolet radiation.How does UV radiation kill bacteria?
Ultraviolet light kills microorganisms by damaging their DNA. UV radiation disrupts the chemical bonds that hold the atoms of DNA together in the microorganism. If the damage is severe enough, the bacteria cannot repair the damage and the cells die.What damage does UV light cause?
Sunlight is a strong source of UV light and it can cause damage to the DNA in the surface layer of your skin after repeated or prolonged exposure, increasing your risk for skin cancer. UV light from sun can damage DNA.What devices use ultraviolet light?
Manufacturers use UV light to treat drinking water and wastewater, to disinfect air, and to make fruit and vegetable juices safer to drink. Many home devices now use UV light to clean everything from computers to toothbrushes . Hospitals increasingly rely on UV disinfection to keep patients and workers safe from ever-resistant viruses and bacteria.