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Learners demonstrate how water can distort, refract and magnify light.

In this optics activity, learners make a simple telescope using two lenses and a cardboard tube. Learners construct the telescope and then calculate its magnification.

In this activity, learners explore ray optics. Learners discover that they can use a magnifying glass to create an upside-down image.

Have you ever heard of a camera without a lens? In this activity, learners create a pinhole camera out of simple materials. They'll see the world in a whole new way: upside down and backwards!

This resource contains several mini-explorations using a slide projector as a light source to investigate light and the properties of images.

Focus sound through a balloon! In this Exploratorium activity, you'll use dry ice to create a balloon that's a sound lens.

Did you know that using a lens one can bend light to make pictures of the world? It's true!

In this activity, learners use Jell-O to explore lenses. Learners cut Jell-O into convex and concave lens shapes and examine how light exits each lens in a darkened room.