Crosswords2 mins ago
Sunny spinny round thing
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?
Answers
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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).
1 to 2 of 2
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