Radiation: Ultraviolet (UV) radiation - World Health Organization …
网页2016年3月9日 — 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. As sunlight passes through the atmosphere, all UVC and most UVB is absorbed by ozone, water …
Ultraviolet radiation - World Health Organization (WHO)
网页2022年6月21日 — 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 ...
Ultraviolet radiation - World Health Organization (WHO)
网页2024年7月30日 — 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. The UV region covers the wavelength range 100-400 nm and …
Radiation: The known health effects of ultraviolet radiation
网页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.
Radiation: Ultraviolet (UV) radiation and skin cancer
网页As ozone levels are depleted, the atmosphere loses more and more of its protective filter function and more solar UV radiation reaches the Earth's surface. It is estimated that a 10 per cent decrease in ozone levels will result in an additional 300,000 non-melanoma and 4,500 melanoma skin cancer cases. The global incidence of melanoma continues ...
Radiation: Ionizing radiation - World Health Organization (WHO)
网页2020年10月26日 — Energy emitted from a source is generally referred to as radiation. Examples include heat or light from the sun, microwaves from an oven, X rays from an X-ray tube and gamma rays from radioactive elements. Ionizing radiation can remove electrons from the atoms, i.e. it can ionize atoms.
Webinar: Disinfection using Ultraviolet Radiation
网页2021年12月17日 — BackgroundThe ability of ultraviolet radiation to disinfect water, surfaces and air has been known for over a hundred years. In the last few decades, the primary application across the world has been water disinfection, but it has also matured as a means of disinfection in healthcare and other environments. The COVID-19 pandemic has …
Ultraviolet (UV) radiation - World Health Organization (WHO)
网页<p>One in every three cancers diagnosed is a skin cancer. 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 …
Radiation: Effects of ultraviolet (UV) radiation on the skin, eyes and ...
网页2003年9月17日 — UV radiation accelerates skin aging, and the gradual loss of the skin’s elasticity results in wrinkles and dry, coarse skin. What are the effects of UV on the eye? The eye is recessed within its orbit and shielded by the brow ridge, the eyebrows and the eyelashes. Bright light activates the constriction of the pupil and the squinting reflex ...
Raising awareness on ultraviolet radiation - World Health …
网页2024年7月29日 — 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 …