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Can gelatin (like Jell-O ®) change the speed of light?

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

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 activity, learners use gelatin as a lens to investigate the properties of laser light.

In this activity, learners make optical fibers out of strips of gelatin.

In this activity, learners make prisms from gelatin. Learners then shine light through the prisms and discover what happens. This activity introduces learners to the idea of refraction.