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This simple hands-on activity demonstrates why the sky appears blue on a sunny day and red during sunrise and sunset.

In this activity, learners use an old CD to construct a spectroscope, a device that separates light into its component colors.

This is a quick activity/demonstration that introduces learners to the concept of index of refraction. Learners place stirring rods in a jar of water and notice they can see them clearly.

Use this hands-on activity to demonstrate infrared and thermal radiation.