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In this simple activity, learners investigate refraction by placing a picture of an arrow behind a glass of water.

Like water drops in falling rain, a CD separates white light into all the colors that make it up.

In this activity, learners use a laser pointer, empty soda bottle, rubber plug and water to demonstrate total internal reflection.

In this sunny day activity, learners compare how a cup of water and a cup of tonic water reflect or refract light in the sun.

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.