Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > sci.physics.relativity > #627372

Re: Ehrenfest paradox

Show all headers | View raw

On Sunday, December 24, 2023 at 12:14:13 AM UTC-8, Thomas Heger wrote:
> Hi NG 
> 
> I had recently read a book about GR and found it astonishing, what 
> Einstein and Ehrenfest said about observers on a rotating disk. 
> 
> https://en.wikipedia.org/wiki/Ehrenfest_paradox 
> 
> 
> 
> To me it is selfevident, that observers on a rotating disk would 
> encounter some kind of outwards acceleration, if that disk rotates. 
> 
> Also the rigid disk itself would ecounter 'length elongation' (radius 
> gets longer), because the centrifugal acceleration tends to tear the 
> disk apart. 
> 
> But neither of these effects were mentioned, while the similarity to 
> gravitation assumed. 
> 
> But as far as I know, gravitation pulls into the opposite direction 
> (towards the center). 
> 
> And: the observer could not possibly regard his rotating disk as at 
> rest, because he had trouble to stay on his feet and on the disk, if 
> that disk rotates. 
> 
> 
> 
> 
> TH
That is a good and sufficient refutation.
Also,
Refutation:
1. If there were (and it did not involve every layer of the disc contracting), then the pi ratio of radius to circumference would no longer exist.
2. Then, it would no longer be a circle.
3. Therefore, length contraction is again disproven by proving to be self-contradictory nonsense.
There is no such thing as length contraction.

This is all any intelligent and (self-) educated person needs to know to be a real scientist instead of a fool (relativist).

Back to sci.physics.relativity | Previous | Next | Find similar

Thread

Re: Ehrenfest paradox Laurence Clark Crossen <l.c.crossen@hotmail.com> - 2024-01-16 19:30 -0800

csiph-web