Ultraviolet radiation is a light spectrum that includes visible light and light that cannot be seen. The human eye cannot detect any UV light, but a few insect have the capability to see the light. The light is indirectly visible through the light-emitting fluorescent objects that emit the radiation through the light they produce.
Ultraviolet light, also known as UV light, is a type of electromagnetic radiation that has a wavelength somewhere close to light and X-rays. It is used broadly all over the world, in everything from the generation of usable electric power to the many other regular uses for a simple black light. UV lights are used in various applications ranging from industrial, commercial and healthcare sectors.