Is 100-400 nm wavelength electronic wave to ultraviolet ray, it is one of the invisible part of the spectrum, to reach the ground ultraviolet wavelength is larger than 290 nanometers, shorter than 290 nm ultraviolet ray is absorbed by the atmospheric ozone layer. In a production environment where objects of temperature above 1200 ℃, can appear ultraviolet radiation spectrum, such as smelting furnace, electric welding, gas welding, mercury quartz lamp, uv ultraviolet lamp also can launch. Ultraviolet (uv) on the function of the body is related to the wavelength of the radiation, the shorter the wavelength, the stronger the effect.
Ultraviolet radiation on human life has a great influence and biological growth. Ultraviolet (uv) according to its wavelength can be divided into three parts: A uv wavelength between 320-400 nm, A uv impact on our performance in the synthesis of vitamin D has A promoting effect, but too much ultraviolet light can cause light to A condensation, suppress the immune system function, or the lack of A little uv radiation and prone to lupus disease and cataract; B ultraviolet wavelengths between 280-320 nm, uv B's influence on our performance in the skin to become red and reduce the production of vitamin D in the short term, long accepted can cause skin cancer, cataract and suppress the immune system function; C ultraviolet wavelengths between 100-280 nm; The influence of ultraviolet radiation on human main show is A uv and uv B synthesis.