Talk:Time dilation/Archive 2022
Latest comment: 4 years ago by 87.163.198.2 in topic Misleading Animation
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Misleading Animation
The animation where the red clock rotates around the blue clock as illustration for special relativistic effects is misleading, since at least one of the two clocks is not part of an inertial system and thus SRT does not apply. — Preceding unsigned comment added by 217.95.168.158 (talk) 14:41, 10 April 2022 (UTC)
- How do you figure? SRT applies to the red clock; the animation shows the effect on that clock compared to the frame of reference of the blue clock. —C.Fred (talk) 14:45, 10 April 2022 (UTC)
- The red clock is rotating around the blue clock so it is not representing an inertial system and so the SRT approach to time dilation does not apply to the red clock. (Well: Of course also the blue clock could be rotating around the red clock, if we take the red clock to be inertial. However, at least one of the systems is not an inertial system.) Of course, in this situation there also is time dilatation, but it is not a special relativistic effect alone. We have general relativistic effects as well, since acceleration is part of the game (or, locally equivalently, gravitation). — Preceding unsigned comment added by 87.163.198.2 (talk) 11:30, 11 April 2022 (UTC)
- You share a common misconception that SRT does not apply to accelerated systems. It does. Where SRT does not apply is in the presence of gravitation. See Spacetime_diagram#Accelerating_observers Prokaryotic Caspase Homolog (talk) 11:59, 11 April 2022 (UTC)
- Interesting argument. Agreeing to yours. Mine runs as follows: The red clock is accelerated. By the equivalency principle this acceleration is locally equivalent to a gravitational field. This gravitational field produces a time dilatation. This effect is not predicted by SRT. So while the SRT might mathematically be used (as your citation suggests), the SRT formula will produce an incorrect result. I agree that the SRT can be used. I fear it will produce an incorrect prediction in the scenario we are looking at. Which leaves us with an illustration in the article suggesting a theory which will be delivering a result which is different from current state of the art (which should use ART, despite the fact that SRT does produce a consistent result, different from experiment). Interested in your opinion on this. 87.163.198.2 (talk) 17:25, 11 April 2022 (UTC)
- You share a common misconception that SRT does not apply to accelerated systems. It does. Where SRT does not apply is in the presence of gravitation. See Spacetime_diagram#Accelerating_observers Prokaryotic Caspase Homolog (talk) 11:59, 11 April 2022 (UTC)
- The red clock is rotating around the blue clock so it is not representing an inertial system and so the SRT approach to time dilation does not apply to the red clock. (Well: Of course also the blue clock could be rotating around the red clock, if we take the red clock to be inertial. However, at least one of the systems is not an inertial system.) Of course, in this situation there also is time dilatation, but it is not a special relativistic effect alone. We have general relativistic effects as well, since acceleration is part of the game (or, locally equivalently, gravitation). — Preceding unsigned comment added by 87.163.198.2 (talk) 11:30, 11 April 2022 (UTC)