Timeline for What is the simplest way to prove the Earth is round?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 10, 2024 at 18:29 | comment | added | Frank R. | @Floris the old allais domain is considered dead and the new valid link would be allais.wiki/priorartdocs/pippard.pdf | |
| Oct 11, 2023 at 17:22 | comment | added | NinjaDarth | The law of motion do not determine whether a surface is a flat Euclidean geometry or not. At best, it can only provide circumstantial evidence on the grounds that it's easier to explain the comparisons of the motion at different places as arising from the rotation of a non-Euclidean surface. But it's not a direct test - which can only be done by measure distances, since curvature is determined by the affine connection of the surface, and that (in turn), in the case of Levi-Civita connections, by the metric - i.e. by distance relations. | |
| Jan 27, 2016 at 20:49 | comment | added | Floris | @dmckee torsion-free suspension is only part of the problem. I have seen the experiments described here from close up. Sir Brian Pippard was arguably a very, very good experimental physicist... but he was stumped. Well - he made a great pendulum, just not great enough to look for confirmation of the Thirring-Lense effect | |
| Feb 26, 2012 at 22:45 | comment | added | dmckee --- ex-moderator kitten | It's also surprisingly hard to build a decent Foucault pendulum. It is necessary to insure that the suspension is torque-free, which is not easy. | |
| Jun 24, 2011 at 11:04 | comment | added | Carson Myers | @Andrew D'oh! I'm tired and assumed they meant the same. I guess by extension it proves the earth is round, assuming you're not doing this experiment at one of the poles. | |
| Jun 24, 2011 at 10:21 | comment | added | Andrew | Doesn' t this merely prove the Earth rotates? | |
| Jun 24, 2011 at 3:00 | history | answered | Carson Myers | CC BY-SA 3.0 |