About the "One Electron at a Time" Animation

To the left of the animation and not seen, we imagine a double slit experiment for electrons. We see the observing screen, where a flash of light is emitted each time an electron strikes it. By default we are firing one electron per second.

The central region of the animation forms a histogram of the number of electrons versus where they landed on the screen.

As time goes by we see an interference pattern emerge.

There are three buttons to control the animation:

Rewind button Rewind the animation and start over
Pause button Pause the animation
Play button Play the animation

There is a random simulation engine inside the animation. Thus if you rewind it, the build-up of the histogram will be similar but almost certainly not identical to the previous "run."

In the lower-right corner are buttons that control how many electrons per second are being fired in the simulation.