Gravity < Planck Mass

  • Thread starter jbunch
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  • #1
jbunch
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Is there any experimental or observational evidence that conclusively shows gravitational forces acting on mass that is less than the Planck mass? thx
 

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  • #2
Vanadium 50
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Does a grain of fine sand fall? Then you have your answer.
 
  • #3
jbunch
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I should have been more explicit. I'm looking for verifiable info. on the limits of gravitational testability on a small scale. thx
 
  • #4
Vanadium 50
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I say again, does a grain of fine sand fall? Why does this not count as gravitational testability?
 
  • #5
jbunch
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It most certainly does. As I said, less than the Planck mass. Let's keep dividing that grain of sand by 2. Looking for a comprehensive list of experimental data that shows the experimental limit. thx
 
  • #7
jbunch
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I don't get it. Are you saying that experiments haven't been carried out? And that there is not a limit to the experiments where we can verify in a lab a gravitational attraction? Doesn't sound crackpot to me. Just looking for the data.
 
  • #8
jbunch
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Here's a good paper showing a Gaussian distribution on Si with a length order of magnitude 10 minus 12. Looking for hard experimental data.

http://arxiv.org/pdf/1210.0457v3.pdf
 
  • #9
Bill_K
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As I said, less than the Planck mass. Let's keep dividing that grain of sand by 2.
No need to make it smaller. The Planck mass is 22 micrograms, so such a grain of sand would be about a tenth of a millimeter across, easily visible to the naked eye.
 
  • #10
ZapperZ
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I don't get this either. Don't we already have neutron-drop experiments? Isn't this smaller than 22 micrograms?

Zz.
 

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