Mar 9, 2016 · 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.

Jul 29, 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.

Jun 20, 2022 · 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 ...

Jun 21, 2022 · 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.

紫外线a（uv-a）射线的波长比紫外线b（uv-b）射线更长，因此能够更深入地穿透眼睛和皮肤的组织层。uv-a和uv-b射线的能量强度也各不相同，uv-a射线的能量较低。因此，uv-a和uv-b引发的生物和健康影响存有差异。 皮肤

Jul 16, 2024 · 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

Jun 22, 2022 · 概述. 紫外线辐射既看不见，也感觉不到。人人都暴露于太阳紫外线辐射，有些人还暴露于人造紫外线辐射源（例如医疗和工业生产中以及用于消毒和美容的人造紫外线辐射）。

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).

En outre, les UV-A dégagent moins d'énergie que les UV-B. Les UV-A et les UV-B peuvent donc avoir des effets différents sur le plan biologique et de la santé. La peau Les UV-A pénètrent profondément dans la peau et peuvent atteindre le derme et l'hypoderme et donc le tissu conjonctif et les vaisseaux sanguins, ce qui entraîne une perte ...

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 …