Pinball Machine

The light shining form the circles on the back wall looks like ordinary white light, but it isn't ordinary at all. The light in this exhibit is unusual because each of the colors is polarized in a different direction. Since your eyes can't tell the difference between horizontal and vertical polarized light, the light still looks white to you. When the white circles reflect from the tabletop and reflections from the walls are different because the table top reflects horizontal polarized light and walls reflect vertically polarized light.