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.
Gary Zeman, ScD, CHP. Ultraviolet (UV) radiation is defined as that portion of the electromagnetic spectrum between x rays and visible light, i.e., between 40 and 400 nm (30â3 eV). The UV spectrum is divided into Vacuum UV (40-190 nm), Far UV (190-220 nm), UVC (220-290 nm), UVB (290-320), and UVA (320-400 nm). The sun is our primary natural source of UV radiation.