AdrianMachin
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Is there any way to make one at home?
DIY homemade Crooke's radiometer?
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AdrianMachin
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Found some cool projects, but was looking for a way to make it like those inside a light bulb.berkeman said:
Baken
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https://www.instagram.com/p/BR3acncFNVK/ I'm building it in a mason jar and will pump the air out with a food saver jar-adapter.
- 30,547
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Good luck with it. You will need to make some pretty good seals and getting the vacuum very low will take some ingenuity. The smaller that your vacuum vessel is, the lower vacuum you will achieve so don't use a large jar.Baken said:
AdrianMachin
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Nice! Please update us if your project is done.Baken said:
Kapitonov
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Cool. Also want to see the results. So, if you can, give us links or smth. 
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From that movie, it seems that a high vacuum is not necessary. which is interesting. A 'Proper' radiometer that works by photon momentum needs high vacuum (to avoid the effect of bouncing molecules in the cheap method).Baken said:
I always find it amazing that it's possible for me to go through life making totally wrong assumptions of 'amounts' when such things are constantly on my (in particular) mind. I must try to make one as well and see just how little vacuum is needed. There will be an optimum compromise between friction and density of fast molecules, I guess. Have you managed to measure the pressure in there? An 'optimistic' estimate can be made, using the 'compression ratio' of the system - pump volume vs vessel volume which ignores leaks etc.
dLouie
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To OP, how's the result of your project? I just realized this post is 2 years old.