Definitions for "Ultraviolet light"
invisible radiation of short wavelength.
The component of radiation from the sun that damages skin tissue the most. The sunburning ultraviolet rays are known as UVB rays. The longer wave length UVA rays can also damage the skin in different ways, especially promoting wrinkles and premature aging. UVB rays especially aggravate lupus skin disease but some lupus patients are also sensitive to UVA rays.
A light source used in non-destructive testing for cracks in metal parts.
A shortwave solar irradiation likely to cause mutations in cells and ultimately skin cancer.