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In this optics activity, learners use glass and water to demonstrate total internal reflection (TIR).

In this optics activity, learners explore how they can make gelatin stop light, but not stop them from seeing fruit suspended within.

In this optics activity, learners make a "light fountain" from a clear plastic bottle, flashlight, and other simple materials.

In this optics activity, learners explore how light bends and affects what we see.

In this optics activity, learners use paint thinner to make a small jar seem to disappear inside a larger jar.