Phosphors are materials that exhibit the phenomenon of luminescence, meaning they can absorb energy and then re-emit it as visible light. They are commonly used in various applications, such as in fluorescent lamps, LEDs, and television screens, where they help convert electrical energy into light. The color of the emitted light depends on the specific composition of the phosphor. These materials can be activated by different energy sources, including ultraviolet light or electron beams. Phosphors are often made from compounds containing elements like zinc, cadmium, or rare earth metals. Their ability to glow makes them essential in creating vibrant displays and enhancing lighting technologies.