Ultraviolet Light has very short wavelengths and is just beyond the violet end of the visible spectrum. It is used to expose patterns on the layers of the microprocessor in a process much like photography.
Radiation present in sunlight, fluorescent light, and to some degree incandescent light. UV light degrades photographs, papers, plastics, adhesives, fabrics and colorants. Special filtering material can be placed over fluorescent tubes, on windows, or in frames to reduce the harm that can be caused by UV radiation.
Light found between the end of the visible light spectrum (violet, 400 nm wavelength) and the beginning of the X-ray spectrum (100 nm wavelength). Common sources include solar rays and fluorescent black lights.