UV Index Forecast Essay Example | Topics and Well Written Essays - 250 words

UV Index Forecast - Essay Example in that respect are five categories for UV index, level 1-2 (low--can safely enjoy being outside), level 3-5 (moderate--take precautions by wearing a hat and sunscreen SPF+15 prove shade during midday hours), level 6-7 (high--protection against sun defame is needed use sunscreen SPF+15 wear long sleeves and pants where applicable), level 8-10 (very high--protection against sun damage needed try not to be outside between 10am-4pm shirt, hat sunscreen are a must seek shade) and level 11+ (extreme--same as very high category).The UV Index is a next day forecast of the amount of skin damaging UV radiation expected to endeavor the earths surface at the time when the sun is highest in the sky (solar noon). The amount of UV radiation reaching the surface is primarily associate to the elevation of the sun in the sky, the amount of ozone in the atmosphere, and the amount of clouds present. The UV Index can range from 0 (night time) to 15 or 16 (in the tro pics under high elevations with a clear sky). The higher(prenominal) the UV Index, the greater the dose rate of skin damaging and eye damaging UV radiation. The higher the UV Index, the smaller the time it takes before skin damage occurs.Ultraviolet (UV) radiation is a specific part of the suns entire spectrum of wavelengths. UV-C spectrum is whole absorbed by atmospheric ozone adn does not reach the earths surface. UV-B is mostly absorbed by the ozone, but can affect plants and animals, and affects humans by reddening of the skin, and possible development of skin cancer. UV-A radiation is needed by humans for the synthesis of Vitamin-, but too much UV-A causes toughening of the skin and other irritations. The variation passim the day of UV radiation is much like that of visible light.The UV Index is a forecast of the probable intensity of skin damaging ultraviolet light radiation reaching the surface during the solar noon hour (1130-1230 local time).