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Sunny spinny round thing

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fly258 | 12:59 Mon 27th Dec 2004 | How it Works
2 Answers

I have one of the above items, 4 vanes mounted on a pivot enclosed in a glass ball and the vanes spin when exposed to light.

3 questions,

1) What is its correct name?

2) How does it work?

3) How do they enclose it in a hollow glass ball?

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Avatar Image moose!

It's called a "Crook's Radiometer". 

 

Read http://math.ucr.edu/home/baez/physics/General/LightMill/light-mill.html for some of the science behind it (not easy reading though).

15:29 Mon 27th Dec 2004
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3) How do they enclose it in a hollow glass ball?


16:43 Thu 30th Dec 2004

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