A cinematograph (Louis and Auguste Lumière -Paris - 1895) demonstrates moving images on a screen.
A light from a lamp mounted behind the semitransparent film projects a series of sequentially changing images onto the screen. If this goes quickly enough, a picture replaces another too quickly for the eye to perceive the change, thereby forming a moving image. You can vary the rate at which the images move by using the slider, but note that the indications of speed depend greatly on your computer’s own speed. The animation can be used to approach the idea of an afterimage.
Drag the to change the speed at which the film passes.
Click on the film to show it in its entirety.