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In this activity about light and perception, learners create pictures in thin air.

In this activity about light and perception, learners discover how a flash of light can create a lingering image called an "afterimage" on the retina of the eye.

In this activity, learners explore light, color and rainbows by making their own rainbow glasses.

In this optics activity, learners examine how a transparent material such as glass or water can actually reflect light better than any mirror.

Make a big canvas of iridescent color with pvc pipe! In this Exploratorium Science Snack, you'll need to cut and assemble some PVC pipe, but the pay-off, the soap-bubble canvas, is big.

This is a classic exercise for visualizing the scale of the Solar System.