Wagon-wheel effect

The wagon-wheel effect is a visual effect that makes an object, usually a spinning wheel, appear to move more slowly or in a different direction than it actually is. This effect is created because the spinning wheel is moving faster than the frame rate of the camera that is recording it. For example, in a movie, the camera might take 24 pictures every second, but the spinning wheel might be moving much faster than that. The camera will take pictures of the wheel in different positions each second, which makes it look like it’s moving slower or even changing direction.