Unlike incandescent bulbs, light emitting diodes (LEDs) do not have a filament. They light up from the movement of electrons in semi-conductor material. When current flows across the diode within the bulb, electrons flow in one direction and positive charge in another. These positive charges are referred to as holes and a free electron can actual fall into a hole, going from a state of higher energy to lower. When that happens, a photon is released. Other electrons excite different orbital levels of atoms, and when they travel from higher to lower energy levels or orbitals of the atom, they emit a photon (light).
Click here to cancel reply.
Sorry,At this time user registration is disabled. We will open registration soon!
Don't have an account? Click Here to Signup
© Copyright GreenAnswers.com LLC