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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.
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May 31, 2024 · Ultraviolet radiation is a form of electromagnetic energy that lies between visible light and X-rays. It has various applications, such as producing vitamin D, sterilizing materials, and fluorescing substances, but it can also cause skin damage and cancer.
- 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...
Mar 9, 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.
- 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...
Aug 10, 2016 · Learn about ultraviolet (UV) light, its sources, effects, and applications in astronomy and Earth science. See images and videos of UV waves from the Sun, stars, galaxies, and aurorae.
Aug 24, 2023 · Ultraviolet (UV) radiation is one part of the electromagnetic spectrum of radiation that reaches Earth from the sun. It is a form of light energy situated on the spectrum just beyond visible...
Ultraviolet (UV) light is part of a family of radiations called the electromagnetic (EM) spectrum. UV is just beyond the violet end of visible light and has smaller wavelengths and greater energy.
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