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What is the uv

by:LiangYueLiang     2020-10-08
The abbreviation of uv and uv, its USES are: ozone, uv germicidal lamp curing, sterilization, photochemical reaction, etc.

uv ultraviolet wavelengths as: 10 - 400nm 。

with wavelength - in 320 390 nm for UVA, also known as long wave ultraviolet light shading effect. It has a strong penetration, can penetrate most transparent glass and plastic. Sunlight contains more than 98% of UVA rays can penetrate the ozone layer and the clouds reach the surface of the earth, UVA can direct the dermis of skin, destruction of elastic fibers and collagen fibers, to our skin. (1), 360 nm wavelength ultraviolet UVA conforms to the phototaxis of insects response curve, trap lamp can be made up. ②300- 420 nm wavelength ultraviolet UVA can completely through special colored glass tubes as visible light, only radiation out of the 365 - nm centered near ultraviolet light, can be used for mineral identification, stage decoration, yanchao etc.

wavelength - in 280 320 nm for UVB, also known as the medium wave ultraviolet erythema effect. Medium penetration, its wavelength shorter part will be absorbed by transparent glass, most of uvb rays in sunlight is absorbed by the ozone layer, only less than 2% can reach the surface of the earth, in summer and in the afternoon will be particularly strong. UVB rays have erythema effect to human body, can promote the formation of mineral metabolism and vitamin D in the body, but long-term or excessive exposure can make skin, and cause swelling peeling. Ultraviolet (uv) care from light, plant growth lamp is to use special through the purple glass ( Not through the light) under 254 nm And peak near 300 nm phosphors.

under 280 nm wavelength for UVC, also known as short-wave ultraviolet sterilization. It the penetrating power of the weak, cannot penetrate much of the transparent glass and plastic. Sunlight contains short-wave ultraviolet almost completely absorbed by the ozone layer. Shortwave ultraviolet radiation to human body harm is very big, short time radiation can burn the skin, long or high strength still can cause skin cancer. Ultraviolet germicidal lamp is UVC short-wave ultraviolet radiation.
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