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Is pure water colorless?
Send waves down a spring to watch them travel and interact.
Stare at one color—but see another.
Discover why the sky is blue and the sunset is red.
Create giant bubbles!
Turn an old CD into a spectroscope to analyze light.
Discover why your favorite cat videos don't leak out of optical fibers.
Demonstrate diffraction using a candle and two pencils.
You can make glass objects disappear.
The Doppler effect causes the “neeeeeoowwm” sound of cars.
Make a record player with a pencil, pin, and paper.
Listen to a beam of light.
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Attribution: Exploratorium Teacher Institute
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