Ultraviolet (UV) radiation covers the wavelength range of 100–400 nm, which is a higher frequency and lower wavelength than visible light. UV radiation comes naturally from the sun, but it can also be created by artificial sources used in industry, commerce and recreation.
The sun is by far the strongest source of ultraviolet radiation in our environment. Solar emissions include visible light, heat and ultraviolet (UV) radiation. Just as visible light consists of different colours that become apparent in a rainbow, the UV radiation spectrum is divided into three regions called UVA, UVB and UVC.
Raising awareness on ultraviolet radiation Small amounts of ultraviolet (UV) radiation are essential to produce vitamin D in people, yet overexposure to sunlight may result in acute and chronic health effects on the skin, eye and immune system.
Qu’est-ce que le rayonnement ultraviolet ? Dans notre environnement, le soleil est de loin la source de rayonnement ultraviolet la plus importante. Le soleil émet de la lumière, de la chaleur et des rayons ultraviolets (UV).
Resumen La radiación ultravioleta no puede verse ni sentirse. Aunque algunas personas están expuestas a fuentes artificiales de esta radiación (por ejemplo, en la medicina, la industria, para la desinfección o con fines cosméticos), todos estamos expuestos a la radiación ultravioleta solar. Los niveles de esta radiación dependen de varios factores: La elevación del sol: cuanto mayor ...
Add Yahoo as a preferred source to see more of our stories on Google. UltraViolet, the digital locker that allows viewers to watch their shows and movies on several platforms, is closing down on July ...
The American Journal of Managed Care: Ultraviolet Phototherapy Without Psoralens Does Not Increase Risk of Skin Cancer, Study Suggests