You can see the spring, but you can’t touch it.

In the Exploratorium’s Touch the Spring exhibit, a spring is placed in front of a concave mirror. The actual spring is not visible to the viewer, but the viewer can see the mirror image of the spring formed in space. When you try to touch [...]

This cylindrical mirror lets you see yourself as others see you.

A flat mirror will always reflect an image that is right-side up and reversed right to left. A cylindrical mirror can produce images that are flipped upside down and images that are not reversed. The image you see in a cylindrical mirror depends on [...]

A reflection of your right side can appear to be your left side. With this Snack, you can appear to perform many gravity-defying stunts.

A large, flat, plastic mirror, 2 x 3 feet (60 x 90 cm) or larger
It is important to get a good, flat mirror, since distortions will ruin the [...]