Ultraviolet radiation - what is it and is it harmful to humans?

What is UV radiation?

Ultraviolet radiation (UV) is part of the electromagnetic spectrum, like X-rays, radio waves or visible light. For practical reasons, it is divided into the following lengths (λ, wavelength in nanometers).
The ultraviolet spectrum is divided into ultraviolet-A (UV-A) with a wavelength of 315-400 nm (nanometers), UV-B (280-315 nm) and ultraviolet-C (UV-C) 200-280 nm , which differ in penetrating ability and biological effect on the body.

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UV-A radiation is source of sunburn, passes through the stratum corneum.
UV-B radiation is used primarily for therapy.
UV-C radiation has a strong germicidal effect, maximum at a wavelength of 253.7 nanometers. May cause skin burn and inflammation of the retina. Radiation from waves shorter than 200 nm produces ozone. It is harmful, therefore, in our lamps, a special quartz (more precisely, uviolet) glass with a special patented coating is used, thanks to which ozone is practically not formed (a small amount of ozone can be released only in the first 100 hours of operation of the lamps). The range of the prevailing wavelength of our devices is 253.7 nm.

Photo: Kvarcalampas.lv

Effects of ultraviolet radiation on the cell

Radiation with a prevailing frequency of 253.7 nanometers is most effective for ultraviolet disinfection. It is the length of the ultraviolet wave that most strongly affects the most sensitive to the action of ultraviolet rays, the cell function-fission. Germicidal (bactericidal) irradiator or recirculator "microbiologically" kills cells of pathogens. Ultraviolet penetrates into the DNA structure of viruses, yeast and other pathogenic bacteria and microorganisms and causes changes in DNA that disrupt the vital functions of the cell. Thus, UV radiation destroys your enemies from the inside.
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