What Is Fluorescence

Fluorescence is luminescence that occurs where the energy is supplied by electromagnetic radiation, usually ultraviolet light. The energy source kicks an electron of an atom from a lower energy state into an excited higher energy state; then the electron releases the energy in the form of light (luminescence) when it falls back to a lower energy state. Fluorescence Examples: fluorescent lights, the red glow of rubies in sunlight, phosphors in television screens