Timeline for Can a ultracentrifuge be used to test general relativity?
Current License: CC BY-SA 3.0
12 events
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| Mar 13, 2021 at 21:51 | comment | added | ralfcis | Let's say you made this into a twin paradox example and stopped the centrifuge. You'd have to rewind the same number of orbits to re-unite the clocks to compare the proper times to establish permanent age diff. If you stopped the fuge and flew the clocks back together along the radius, that is a much shorter distance than the accumulated orbits so there must be some rule broken here to establish twin paradox perm age diff. | |
| Apr 13, 2017 at 12:39 | history | edited | CommunityBot |
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| Apr 8, 2017 at 21:38 | comment | added | doetoe | Could we turn this around and invoke the equivalence principle to conclude that the time dilation due to gravity can be computed by making the calculation for an appropriate centrifuge (i.e. what you did)? | |
| Apr 5, 2017 at 18:10 | comment | added | doetoe | @JohnRennie Thanks John! I'll think about it a bit more. | |
| Apr 5, 2017 at 15:15 | comment | added | John Rennie | @doetoe: No. The computation is the same in GR. In fact SR is just a specific case of GR where the metric is the Minkowski metric. In a curved spacetime the method for the calculation would be the same but the metric would be more complicated. Actually this is an important point since if you understand the calculation I describe you basically understand how to use metrics in GR, so GR isn't as hard as you think! | |
| Apr 5, 2017 at 15:03 | comment | added | doetoe | Maybe I'm mistaken, but aren't you just showing that the time dilation in this situation can be computed using special relativity, but not that it gives the same answer as when using general relativity? | |
| Aug 3, 2015 at 23:03 | comment | added | Joe | Would it be possible to show the time dilation using gravitational time dilation formula? | |
| Jan 4, 2015 at 8:40 | comment | added | JDługosz | Ah, ds is the thing to agree on, not necessarily dt. So we can have observer in frame 1 at proper time T see the clock in frame 2 as being behind his, which implies that the odometers differ too. | |
| Nov 24, 2014 at 20:35 | comment | added | Carlos Freites | @JohnRennie Yes John, the imaginary elevator experiment one. | |
| Nov 24, 2014 at 11:13 | comment | added | John Rennie | @CarlosFreites: which comment? If you mean your second comment asking about the three scenarios then I think that's a different question to the one you asked. | |
| Nov 24, 2014 at 11:10 | comment | added | Carlos Freites | Please read my comment to @Physicist137 and physics.stackexchange.com/questions/87673/… | |
| Nov 24, 2014 at 7:23 | history | answered | John Rennie | CC BY-SA 3.0 |