On Friday, January 17, 2025 at 6:37:46 AM UTC-7 John Clark wrote:
On Fri, Jan 17, 2025 at 7:08 AM Alan Grayson <agrays...@gmail.com> wrote: *> The distance to Andromeda the traveler measures using the LT, is not the measured value in the target frame.* *That's because distance is relative, not absolute, and the traveler is moving relative to both the Earth and Andromeda, but the Earth and Andromeda happen not to be moving relative to each other ,... well they are but for the purposes of this thought experiment we can pretend that they are not. * > *This behavior negates the claim that the LT produces what is actually measured in the target frame* *If the Earth astronomer understands Lorentz Transformations and he knows how fast the traveler is moving relative to himself then he can predict what number the traveler will obtain when he measures the distance to Andromeda. * *What this to do with anything I posted? AG* *I suggest you take a look at this video, the guy has the ability to explain complicated things as simply as possible. * *Why the twin paradox is NOT about acceleration <https://www.youtube.com/watch?v=GsMqCHCV5Xc>* *Did say anything about acceleration? Obviously, in your anxiousness to respond, you omitted to actually reading what I wrote. I used SR purposely so I could compare the result to that obtained in the Andromeda case. It's obvious that in the Andromeda case, what the LT predicts for measurements in the target frame isn't what is measured in that frame, so what you wrote above has nothing to do with nothing. BTW, one can use acceleration in the Twin Paradox. It can be used to show the frames are not symmetric, where the assumption of symmetry is the cause of the paradox. AG* *John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* na -- 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 everything-list+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/everything-list/3c48eaa9-833f-42a0-aa82-5cb3614aae9fn%40googlegroups.com.
