nephrosis neÂ·phroÂ·sis (nÉ-frÅ'sÄ­s) n. pl. neÂ·phroÂ·ses (-sÄz) Disease of the kidneys marked by degeneration of renal tubular epithelium. See nephrotic syndrome.
Ultraviolet light is a form of radiation which is not visible to the human eye. It's in an invisible part of the electromagnetic spectrum. Radiated energy, or radiation, is given off by many objects: a light bulb, a crackling fire, and stars are some examples of objects which emit radiation. The type of radiation being emitted depends on the temperature of the object.
Ultraviolet: Ultraviolet light (UV) is divided into two major types, UVB and UVA. UVC is the third category that is filtered by the ozone layer so we essentially get no exposure to this (which is a great thing).