This movie shows the flow of electrons (red) through an LED-containing circuit. When the electrons move from the conduction band of the p-type semiconductor to the valence band of the p-type semiconductor in the LED, light is emitted.
To view the movie, click on the "play" button on the left of the bar under the picture. This button can also be used to pause the movie while it is playing. The buttons on the right of the bar under the picture can be used to advance or rewind the movie one frame at a time.
Note: You must have QuickTime loaded on your computer to view this movie. If you have not already downloaded QuickTime, click here to do so now.