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Ultraviolet (UV) light is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight , and constitutes about 10% of the total electromagnetic radiation output from the Sun.
3 de abr. de 2024 · Learn about ultraviolet radiation, the portion of the electromagnetic spectrum between visible light and X-rays. Find out how it is produced, absorbed, and used for various purposes, and what are its benefits and risks for humans and the environment.
- The Editors of Encyclopaedia Britannica
- Ultraviolet radiation is the portion of the electromagnetic spectrum extending from the violet, or short-wavelength, end of the visible light range...
- Ultraviolet radiation is produced by high-temperature surfaces, such as the Sun’s, in a continuous spectrum and by atomic excitation in a gaseous d...
- No, ultraviolet radiation is undetectable by the human eye. Many insects, however, are able to see ultraviolet radiation.
- Ultraviolet radiation is useful as both a research tool and a sterilizing technique. It can also be used in fluorescent lamps, which are a more ene...
- The three basic skin cancers, basal- and squamous-cell carcinoma and melanoma, have been linked to long-term exposure to ultraviolet radiation and...
A radiação ultravioleta (UV) é a radiação eletromagnética cujo comprimento de onda é menor que o da luz visível e maior que o dos raios X, de 380 nm a 1 nm. O nome significa mais alta que (além do) violeta (do latim ultra ), pelo fato de que o violeta é a cor visível com comprimento de onda mais curto e maior frequência .
10 de ago. de 2016 · Learn about ultraviolet (UV) light, its sources, effects, and applications in astronomy and Earth sciences. See images and videos of UV waves from the Sun, stars, galaxies, and aurorae.
9 de mar. de 2016 · Learn about the types, sources, effects and protection of UV radiation from the World Health Organization. Find out how ozone depletion, season, time, altitude, clouds and reflection affect your UV exposure and risk of skin cancer.
- Everyone is exposed to UV radiation from the sun and an increasing number of people are exposed to artificial sources used in industry, commerce an...
- Ozone is a particularly effective absorber of UV radiation. As the ozone layer gets thinner, the protective filter activity of the atmosphere is pr...
- The three types of UV radiation are classified according to their wavelength. They differ in their biological activity and the extent to which they...
- Time of year and time of day UV levels vary mainly with the height of the sun in the sky and in mid-latitudes are highest during the summer months...
Física. Magnetismo. Radiação ultravioleta (UV) A radiação ultravioleta (UV) é uma onda eletromagnética capaz de causar danos nos humanos devido à sua alta capacidade de penetração na pele e seu efeito cumulativo. A exposição excessiva ao Sol pode causar queimaduras, melasmas e, ao longo dos anos, câncer de pele.
A luz ultravioleta (UV) pode ser entendida como toda a radiação eletromagnética com comprimento de onda entre 200 e 400 nanômetros (nm) e de frequência maior que a luz visível. Ela possui essa denominação porque violeta é a cor de maior frequência que a visão humana consegue enxergar.
