What is ultra violet?
Ultraviolet (“UV”) light is one of the frequencies of light that is given off by the sun. Ultraviolet light is not visible to the human eye; it is an invisible part of the “electromagnetic spectrum”. Ultraviolet radiation, visible light and infrared energy are all given off by the sun. The image below shows the electromagnetic spectrum, which includes ultraviolet, infrared and visible light along with other types of energy.