On Sunday, December 8, 2024 at 7:03:13 PM UTC-7 John Clark wrote:
On Sun, Dec 8, 2024 at 7:39 PM Alan Grayson <[email protected]> wrote: *> two frames which reach opposite conclusions about whether the car can fit in the garage!* *Yes but disagreeing about how long something is is the inevitable consequence of disagreeing about simultaneity. And after the thought experiment is over and the car slows down so it's in the same frame of reference as the garage there is no evidence of any paradox having occurred, there would be one if one observed the car making a big hole in the back door and the other did not, but nobody observed such a thing. * *This is nonsense. Only if the car slows down to be at rest, will the car and garage be in the same frame, where there is no length contraction. This is just the initial condition where there is no paradox, none alleged, and no paradox to be observed. Obviously, the paradox exists only when the car speeds up, to a sufficient speed so it can fit exactly in the garage, from the pov of the garage frame. But why stop here? If the car continues to speed up, we have the well-defined paradox which you refuse to admit since the issue of simultaneity ceases to give ambiguous results. AG* *> Why is this so hard to understand?* *Because it's very hard to understand something if it's not true. I think I'll repeat what I said before:* *"Either Einstein was wrong in 1905 and all professional physicists for the last 120 years have been wrong in accepting Einstein's argument, or you Alan Grayson are correct and have found a flaw that nobody in the last 120 years had noticed before. Which do you honestly think is more probable?"* *I don't how this problem is resolved within the context of relativity. All I can say is that the frames differ on what's observed; they come to opposite conclusions. No way of denying that, without introducing an artificial, unnecessary issue of simultaneity. AG* *John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* hrz -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/everything-list/cff91582-5ce2-4b29-979d-168c6e93fd45n%40googlegroups.com.
