Radiation: Ultraviolet (UV) radiation - World Health Organization …
2016年3月9日 · 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)
2022年6月21日 · 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.
Ultraviolet radiation - World Health Organization (WHO)
2024年7月29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.
Radiation: The known health effects of ultraviolet radiation
2024年7月16日 · 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
Radiation: Ultraviolet (UV) radiation and skin cancer
Within some countries there is a clear relationship between increasing incidence of non-melanoma skin cancers with decreasing latitude, i.e. higher UV radiation levels. Malignant melanoma Since the early 1970s, malignant melanoma incidence has increased significantly, for example an average 4 per cent every year in the United States.
Health consequences of excessive solar UV radiation
2006年7月25日 · Much of the UV-related illness and death can be avoided through a series of simple prevention measures. The report, Global Burden of Disease of Solar Ultraviolet Radiation estimates that up to 60,000 deaths a year worldwide are caused by too much exposure to ultraviolet radiation (UVR).
SunSmart Global UV App helps protect you from the dangers of …
2022年6月21日 · A new app for mobile phones that provides localized information on ultraviolet (UV) radiation levels has been launched by the World Health Organization (WHO), the World Meteorological Organization (WMO), the United Nations Environment Programme (UNEP) and the International Labour Organization (ILO). The SunSmart Global UV app provides five-day …
Global solar UV index : a practical guide - World Health …
2002年6月13日 · The Global Solar UV Index (UVI) described in this document is a simple measure of the UV radiation level at the Earth’s surface and an indicator of the potential for skin damage. It serves as an important vehicle to raise public awareness and to alert people about the need to adopt protective measures when exposed to UV radiation.
Radiation: Ionizing radiation - World Health Organization (WHO)
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.
Annex 2 71 3.2.4 It is also common for public water supply organizations to conduct tests and guarantee that the drinking-water delivered is of drinking quality. !is test-