UV Light

UV Light: Electromagnetic Radiation

UV radiation (ultraviolet radiation), commonly also called ultraviolet light, is electromagnetic radiation. It refers to a wavelength that is shorter than that of light visible to humans. Therefore, UV light is also invisible to humans.

The term ultraviolet arose because the UV spectrum adjoins violet, which humans can just barely perceive, towards shorter wavelengths.

UV light is an essential component of sunlight. Humans also need UV light for vitamin D synthesis.