The Difference Between Uv And Uv Essay

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What is the difference between UV-A and UV-B radiation? UVB - Medium - wavelength UVB is very living active but cannot go through beyond the superficial skin layers. It is responsible for delayed tanning and burning; in addition to these short-term effects it enhance skin ageing and some what promotes the development of skin cancer. They are present all year around and depending upon the time of year, can be 30 to 50 times more prevalent than UVB rays. UVB, the chief causes of skin reddening and sunburn, tends to damage the skin’s more superficial epidermal layers. “It plays a key role in the development of skin cancer and a contributory role in tanning and photoaging. Its intensity varies by season, location, and time of day.” The most significant amount of UVB hits the U.S. between 10am and 4pm from April to October. However, UVB rays can burn and damage your skin year-round, especially at high altitudes and on reflective surfaces such as shower ice, which bounces back up to 80 percent of the rays that they hit the skin twice. UVB rays do not some what go through glass. UVA which goes through the skin more deeply than the UVB, UVA, has long been known to play a major part in skin aging a wrinkling (photoaging), but until recently scientists believed it did not cause significant damage in areas of the epidermis (outermost skin layer) where most skin cancer occur. Studies over the past two decades, however, show that UVA damages skin cells called
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