DIY homemade Crooke's radiometer?

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SUMMARY

This discussion focuses on the DIY construction of a Crooke's radiometer, specifically using a mason jar and a food saver jar-adapter for vacuum sealing. Participants emphasize the importance of achieving a low vacuum and creating effective seals to enhance the radiometer's functionality. The conversation highlights that while a high vacuum is traditionally necessary for optimal performance, a lower vacuum may still yield interesting results. Users share links to visual references and express interest in project updates and outcomes.

PREREQUISITES
  • Understanding of vacuum sealing techniques
  • Familiarity with basic physics principles related to photon momentum
  • Experience with DIY projects and materials
  • Knowledge of pressure measurement concepts
NEXT STEPS
  • Research vacuum sealing methods using food saver technology
  • Explore the physics of photon momentum and its effects in low-pressure environments
  • Learn about measuring pressure in vacuum systems
  • Investigate alternative materials for constructing a Crooke's radiometer
USEFUL FOR

DIY enthusiasts, physics students, hobbyists interested in experimental science, and anyone looking to understand the principles behind Crooke's radiometers.

AdrianMachin
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Is there any way to make one at home?
 
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AdrianMachin said:
Is there any way to make one at home?
What have you found in your Google searching so far?
 
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berkeman said:
What have you found in your Google searching so far?
Found some cool projects, but was looking for a way to make it like those inside a light bulb.
 
Baken said:
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.
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.
 
Cool. Also want to see the results. So, if you can, give us links or smth. :wink:
 
Baken said:
pump the air out with a food saver jar-adapter.
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).
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.
 
To OP, how's the result of your project? I just realized this post is 2 years old.
 

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