The Exploratorium is temporarily closed. Explore our online resources for learning at home.
A reflector stretches light from colored tiles into long bright ribbons.
Where: Bechtel Gallery 3: Seeing & Listening
When the disk is spun, the colors you see are illusions. This effect was popularized in 1894 by toymaker C. E. Benham, who called his spinning disk an “artificial spectrum top."
Stare at a bird’s eye for 30 seconds, then look into the empty cage. You’ll see a ghostly bird—of a very different color—inside the cage
Step in front of this wall, and you’ll make shadows of various colors—yellow, magenta, cyan, red, green, blue, and yes, even black—that wiggle, jump, and dance along with you.
Split light apart and put it back together again.
Where: Osher Gallery 1: Human Phenomenon
Pier 15 (Embarcadero at Green Street)San Francisco, CA 94111(415) 528-4444
More Contact Info
Get at-home activities and learning tools delivered straight to your inbox