Scientific Light Bulb

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Scientific Light Bulb

Stock Number 2283-32

 This teaching aid demonstrates how light from the sun can be used to generate motion. It dates to the late 1800's. The four little flags are painted black on one side and white on the other side. When placed near a window, the black surface attracts
heat and the white surface repeals heat.
The difference in the amount of attraction
will set the little flags in motion.
The more heat the faster the flags will spin.


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