Pulfrich Pendulum uses shadows and smoked plexiglas to perceive depth. When you look at the shadows of these moving pendulum with a piece of smoked plexiglas over one of your eyes, your brain perceives depth. The Pulfrich effect describes this effect whereby delaying the light entering one of your eyes causes you to see depth.
- Project LITE
A number of illuminating applets including examples of the Pulfrich effect and an explanation of how it works