Register to reply

Experimental verification of Ehrenfest Paradox

Share this thread:
d3mm
#1
Nov14-12, 07:06 PM
P: 139
I am not completely convinced that the modern resolution is correct.

Is it?

Is anyone aware of any experiments that have been done that relate to this effect?

Reference: http://en.wikipedia.org/wiki/Ehrenfest_paradox
Phys.Org News Partner Science news on Phys.org
Experts defend operational earthquake forecasting, counter critiques
EU urged to convert TV frequencies to mobile broadband
Sierra Nevada freshwater runoff could drop 26 percent by 2100
harrylin
#2
Nov15-12, 03:50 AM
P: 3,187
Hi, this topic has been well discussed before (and despite some confusion in the literature it never really was a paradox), see:

- http://www.physicsforums.com/showpos...53&postcount=5

- The original paper simply proves that according to SR real matter cannot be totally rigid (and there is nothing paradoxical about that):
http://en.wikisource.org/wiki/Unifor..._of_Relativity

PS. A short answer about experiments: it is very difficult to imagine an experiment that could allow to verify the contraction of a spinning disc. The inertial effect is always much greater and already not-so-fast rotating discs disintegrate (explode).
A.T.
#3
Nov15-12, 05:59 AM
P: 4,078
Quote Quote by harrylin View Post
PS. A short answer about experiments: it is very difficult to imagine an experiment that could allow to verify the contraction of a spinning disc. The inertial effect is always much greater and already not-so-fast rotating discs disintegrate (explode).
A spinning disc cannot contract much because the radial direction is not contracting. A spinning ring could potentially contract if it was very light (minimal centrifugal forces) and very strong. But I doubt an experiment is feasible with known materials.

harrylin
#4
Nov15-12, 06:07 AM
P: 3,187
Experimental verification of Ehrenfest Paradox

Quote Quote by A.T. View Post
A spinning disc cannot contract much because the radial direction is not contracting. [..] A spinning ring could potentially contract if it was very light [..].
I suspect that a very thin ring of any known useable material would still expand, but I did not calculate it (anyone?).


Register to reply

Related Discussions
Ehrenfest Paradox + Twin Paradox Special & General Relativity 16
Experimental verification of QFT? Quantum Physics 7
Experimental verification Special & General Relativity 6
Ehrenfest paradox (again?) Special & General Relativity 5
First experimental verification of GR Special & General Relativity 6