Discuss “How Things Work: Rainbows”

It?s a beautiful sunny morning after a long night of rain. You look out your window, and there before your eyes is a rainbow! As you stare in awe, you desperately look for its end, to find that lucky pot of gold. But while you stare at nature?s brilliant spectacle, there?s no need to wonder how rain and sun can align to put color in the sky. You?re about to find out.

The fundamental process at work in a rainbow is refraction, the ?bending? of light. Light bends, changing directions when it travels from one medium to another. This happens because light travels at different speeds in different mediums. We see rainbows partly because light travels faster in air than it does in water.

To understand why light bends, imagine you?re roller -skating...