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- Radiation: Ultraviolet (UV) radiation - World Health Organization (WHO)
The shorter the wavelength, the more harmful the UV radiation However, shorter wavelength UV radiation is less able to penetrate the skin The UV region covers the wavelength range 100-400 nm and is divided into three bands: UVA (315-400 nm) UVB (280-315 nm) UVC (100-280 nm) Short-wavelength UVC is the most damaging type of UV radiation
- Ultraviolet radiation - World Health Organization (WHO)
UV exposure may also be involved in the development of age-related macular degeneration (AMD) Worldwide, it is estimated that 15 million people are blind due to cataracts; of these, some 10% may be due to exposure to UVR Vitamin D production UVR in small amounts is essential to good health as it leads to the production of vitamin D in the body
- Radiation: The ultraviolet (UV) index - World Health Organization (WHO)
The UV Index is an important vehicle to raise public awareness of the risks of excessive exposure to UV radiation, and to alert people about the need to adopt protective measures As part of an international effort, the UV index was developed by WHO, the United Nations Environment Programme, the World Meteorological Organization and the
- Ultraviolet radiation - World Health Organization (WHO)
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
- Radiation: The known health effects of ultraviolet radiation
UV-A rays have longer wavelengths than UV-B rays, and thus penetrate deeper into the tissue layers of the eye and the skin UV-A and UV-B rays also differ from each other by how strong their energy is, with UV-A rays having a lower amount of energy UV-A and UV-B can therefore trigger different biological and health effects The skin
- Ultraviolet (UV) radiation - World Health Organization (WHO)
The main factor that predisposes to the development of skin cancer is exposure to ultraviolet (UV) radiation, traditionally from the sun and more recently from artificial tanning sunbeds Both solar radiation and sunbeds are classified as carcinogenic to humans by the WHO International Agency for Research on Cancer (IARC)
- 辐射：紫外线辐射对健康的已知影响
uv-b可在几天内刺激产生新的黑色素，从而使晒黑效果能够持续相对较长时间。uv-b还刺激细胞产生更厚的表皮。因此，uv-b和uv-a一起导致外层细胞合成、变暗和变厚——这些反应是人体对进一步出现紫外线伤害的防御方式。 uv-b是晒伤的主要原因。
- Rayonnement ultraviolet - World Health Organization (WHO)
Le rayonnement ultraviolet (UV) ne peut être ni vu ni ressenti Alors que certaines personnes sont exposées à des sources artificielles de rayonnement UV (par exemple en médecine, dans l’industrie et à des fins de désinfection et cosmétiques), tout le monde est exposé aux rayons UV solaires
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