This week's experiment is one that I have been playing with for quite some time. It is something that I first noticed when I was a child in school. Way back then, we watched educational movies sometimes in class. There were no VCRs or video tapes. Instead, the film was on big reels and fed through a movie projector. When the movie was over, you would rewind the film back onto the reel, and as the reels were spinning quickly, you could see bands of yellow and blue light, like the spokes of a wheel on the reels. Since then, I have found several other ways to see these blue and yellow bands. For this demonstration, you will need:

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We are used to associating electricity with light bulbs, but most people expect it to take a lot of power to light them. For incandescent bulbs, that is true, but with fluorescents, things are a bit different.

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We are used to thinking that it takes a lot of energy to produce light. This time, we will see that even a small amount of the right kind of energy can give us some light.

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Street Lights

Why are some street lights yellow and others a blue-white color?

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Static Glow

Lighting a light bulb with a balloon is not nearly as difficult as you might think.

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States of Matter

Solids, liquids, gases, and plasma too.