Light and Color

Holes in a Wall

HOLES IN A WALL demonstrates that at every point in space there is an image of the scene beyond it. This phenomenon is shown with a large piece of sheet metal drilled with small holes, with very few holes at one end gradually increasing in number to a dense clustering at the other. The visitor holds a frosted plastic screen in front of the wall and sees that an image is formed by each and every hole in the screen with the images becoming very crowded and confused at the “holey" end of the exhibit, even though each individual image remains sharp.