The Exploratorium
Science Snacks
Snacks about Refraction

Snack name


Critical Angle

Why your phone calls don't leak out of optical fibers.

Disappearing Glass Rods

You can make glass objects disappear.

Giant Lens

A lens creates an image that hangs in midair.

Laser Jello

Use gelatin as a smoked lens, to view total internal reflection, and as a color filter.

Water Sphere Lens

Make a lens and a magnifying glass by filling a bowl with water.