Timeline for How do length measurements with measuring sticks depend on the metric in general relativity?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Jun 5, 2021 at 11:32 | vote | accept | anoniem | ||
| Jun 5, 2021 at 11:31 | vote | accept | anoniem | ||
| Jun 5, 2021 at 11:32 | |||||
| Mar 3, 2021 at 21:45 | comment | added | J. Murray | @anoniem I would suggest asking that as a separate question - I'd be interested in answering it, if I see it. The first case with no cross term works out just fine, and you can see that without much work. The second case has an additional subtlety, which is that by choosing a weird coordinate $y$ which is not orthogonal to $t$, a stationary object still has a changing $y$-coordinate. This is a (relatively simple) example of a frame dragging effect. | |
| Mar 3, 2021 at 18:09 | comment | added | anoniem | Thanks! I think I understand it better now. Maybe I should post it as a different question, but if, for this case, one measures the spatial distance from the time it takes a light signal to travel between two points, then the result is the same as one would obtain with rods? | |
| Mar 3, 2021 at 14:35 | history | edited | J. Murray | CC BY-SA 4.0 |
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| Mar 3, 2021 at 14:20 | history | answered | J. Murray | CC BY-SA 4.0 |