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Why is UV light important?

Ultraviolet light (UV-ultra violet) is a part of the EM spectrum that is above the spectrum of visible light and below X-ray radiation. The area of ​​the ultraviolet spectrum includes wavelengths from a few nm (nanometers) to a few hundred nm, i.e. frequency range from 1014 Hz to 1017 Hz. As with other parts of the spectrum, sharp boundaries do not exist.

Ultraviolet light rays are high energy photons. UV light is divided into three sub-regions (UV-A, UV-B and UV-C) which differ in frequency, i.e. wavelength, which means energy. The biggest natural source of UV radiation is the Sun.