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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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Aug 6, 2024 · Ultraviolet (UV) radiation is undetectable by the human eye, although, when it falls on certain materials, it may cause them to fluoresce—i.e., emit electromagnetic radiation of lower energy, such as visible light. Many insects, however, are able to see ultraviolet radiation.
- 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 · 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. As sunlight passes through the atmosphere, all UVC and most UVB is absorbed by ozone, water vapour, oxygen and carbon dioxide.
- 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...
Ultraviolet (UV) radiation is a form of energy that the sun produces. You can’t see UV radiation because its wavelengths are shorter than visible light. The UV energy that the sun produces reaches the Earth and provides vitamin D for your body to help you survive.
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) 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.
