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ultraviolet    音标拼音: [,ʌltrəv'ɑɪəlɪt]
a. 紫外线的

紫外线的

ultraviolet
紫外线 UV

ultraviolet
紫外线

ultraviolet
adj 1: having or employing wavelengths shorter than light but
longer than X-rays; lying outside the visible spectrum at
its violet end; "ultraviolet radiation"; "an ultraviolet
lamp"
n 1: radiation lying in the ultraviolet range; wave lengths
shorter than light but longer than X rays [synonym:
{ultraviolet}, {ultraviolet radiation}, {ultraviolet
light}, {ultraviolet illumination}, {UV}]

Ultraviolet \Ul`tra*vi"o*let\, a. [Pref. ultra- violet.]
(Physics)
Lying outside the visible spectrum at its blue-violet end; --
said of light more refrangible (i. e. having a shorter
wavelength) than the extreme violet rays of the visible
spectrum. Electromagnetic radiation with wavelengths shorter
than those of ultrviolet light are not usually considered as
light waves, but are classified differently. The ultraviolet
region of the electromagnetic spectrum is generally
considered as comprising those electromagnetic emissions with
wavelengths lying between those of visible light and those of
X-rays, i. e. between 4000 Angstroms and 100 Angstroms.
[1913 Webster PJC]


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  • Radiation: Ultraviolet (UV) radiation
    The sun is by far the strongest source of ultraviolet radiation in our environment 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
  • 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
  • Ultraviolet radiation - World Health Organization (WHO)
    Key facts 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 Worldwide, it is estimated that 15 million people are blind due to cataracts; of these, some 10% may be due to
  • Radiation: The known health effects of ultraviolet radiation
    UV radiation can cause short- and long-term health effects on the skin In addition to the well-known short-term effects such as sunburn or allergic reactions, long-term effects like skin cancer represent a chronic health risk Skin cancer risk is strongly correlated with the duration and frequency of sun exposure over one’s lifetime Cumulative UV dose is related to the development of
  • Rayonnement ultraviolet - World Health Organization (WHO)
    Qu’est-ce que le rayonnement ultraviolet ? Dans notre environnement, le soleil est de loin la source de rayonnement ultraviolet la plus importante Le soleil émet de la lumière, de la chaleur et des rayons ultraviolets (UV)
  • 紫外线辐射 - World Health Organization (WHO)
    zi3wai4xian4fu3she4重要事实 皮肤癌主要由暴露于紫外线辐射所致。紫外线辐射来自太阳或日光浴床等人造日光源。 2020年，全球共检出150多万例皮肤癌，并报告了12万例以上皮肤癌死亡。 据估计，全世界共有1800万人因白内障而失明，其中约10%可能是因暴露于紫外线辐射。 儿童和青少年暴晒会导致今后患
  • Raising awareness on ultraviolet radiation
    Small amounts of ultraviolet (UV) radiation are essential to produce vitamin D in people, yet overexposure to sunlight may result in acute and chronic health effects on the skin, eye and immune system The rise in the incidence of skin cancers over the past decades is strongly related to increasingly popular outdoor activities and recreational exposure Experts believe that 4 out of 5 cases of
  • 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
  • Les effets connus des UV sur la santé
    Les UV-A ont une longueur d’onde supérieure à celle des UV-B et pénètrent donc plus profondément dans les couches de l’œil et de la peau 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 Les UV-A pénètrent profondément dans la peau et peuvent atteindre le derme et l
  • Radiación ultravioleta - World Health Organization (WHO)
    Resumen La radiación ultravioleta no puede verse ni sentirse Aunque algunas personas están expuestas a fuentes artificiales de esta radiación (por ejemplo, en la medicina, la industria, para la desinfección o con fines cosméticos), todos estamos expuestos a la radiación ultravioleta solar Los niveles de esta radiación dependen de varios factores: La elevación del sol: cuanto mayor





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