What+is+an+LED+(Light+Emitting+Diode+)

What is an LED (Light Emitting Diode )

LED’s or light-emitting diodes are very small semiconductor diodes which have a unique property of glowing when electricity is passed through them. When an electron travels through a LED’s p-n junction the electron gives off a little bit of energy as a photon of light. The wavelength (or colour if it’s in the visible spectrum for humans) is determined by the material used in the semiconductor and modern LED’s come in a wide variety of colours.