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1. en.wikipedia.org › wiki › UltravioletUltraviolet - Wikipedia

   en.wikipedia.org › wiki › Ultraviolet

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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.

2. www.who.int › news-room › questions-and-answersRadiation: Ultraviolet (UV) radiation - World Health Organization...

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   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.

3. www.britannica.com › science › ultraviolet-radiationUltraviolet radiation | Definition, Examples, Effects,...

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   23 wrz 2024 · ultraviolet radiation, that portion of the electromagnetic spectrum extending from the violet, or short-wavelength, end of the visible light range to the X-ray region. 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 ...

4. science.nasa.gov › ems › 10_ultravioletwavesUltraviolet Waves - Science@NASA

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   10 sie 2016 · Ultraviolet (UV) light has shorter wavelengths than visible light. Although UV waves are invisible to the human eye, some insects, such as bumblebees, can see them. This is similar to how a dog can hear the sound of a whistle just outside the hearing range of humans.

5. sciencenotes.org › ultraviolet-light-or-uv-radiationUltraviolet Light or UV Radiation - Science Notes and Projects

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   1 kwi 2023 · Learn about the types, sources, effects, and uses of ultraviolet light, the portion of the electromagnetic spectrum between x-rays and visible light. Find out how UV light affects the human body, animals, and the environment, and how to protect yourself from harmful exposure.

6. www.who.int › health-topics › ultraviolet-radiationUltraviolet radiation - World Health Organization (WHO)

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   29 lip 2024 · 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.

7. www.who.int › news-room › fact-sheetsUltraviolet radiation - World Health Organization (WHO)

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   21 cze 2022 · Skin cancers are caused primarily by exposure to ultraviolet radiation (UVR), either from the sun or from artificial sources such as sunbeds. Globally in 2020, over 1.5 million cases of skin cancers were diagnosed and over 120 000 skin cancer-associated deaths were reported.