how does a light bulb work?
When you turn your lamp on, the electricity travels from the electric company’s generator through wires into your house. Since your lamp is plugged into an electric outlet, the electricity flows along lead-in wires to the bulb, first through the screw-in base of the bulb, around the bulb through the filament, and down into a lit
Incandescent: The current through the bulb is used to make a filament of tungsten white hot. When it gets this hot, it also gives off light, which is a light bulb. The bulb must be sealed and filled with argon in order to prevent the tungsten from degrading in air. Flourescent: A current is passed through a halogen and the excited halogen gives off light. While this may seem to be enough, it’s not. a powder mix on the inner shell of the bulb absorbs light and re-emits it at certain wavelengths. The mix dictates the balance of color in the bulb LED: Two semiconductors are spaced rather close to each other. One is called P-doped, and the other is called N-doped. When current is passed through these semiconductors, the N-doped semiconductor becomes excited and its electrons become free. These electrons have a natural tendency to go to the P-doped Semiconductor, but must jump the gap between the two. This jump releases light at a certain wavelength, based on the semiconducting materials.
