On Tuesday, December 17, 2024 at 11:45:48 AM UTC-7 John Clark wrote:
On Tue, Dec 17, 2024 at 4:10 AM Alan Grayson <[email protected]> wrote: *> From the car's frame, the garage's length has decreased from its rest length, where it couldn't fit, and now imaging a fit is worse than the initial situation. So, what has simultaneity have to do with the solution? Apparently nothing! AG* *You're going over old ground. Again. Back when this interminable conversation started, it seems like it must've been during the late Jurassic era but actually it was only October 28, I said the following and today I see no reason now to modify what I said: * Not old ground. I fail to see that differences in simultaneity is necessary to solve this problem, but now I just see two frames which differ in what they measure, which SR allows. AG * "how would this look from the driver of the car's point of view? He would see the car as being stationary and therefore 10 feet long, but the garage is moving so fast due to Lorentz contraction the garage is now only 8 feet deep not 9, and apparently making things even worse. * That's the car frame. Yes, we agree. AG *However, what the car driver sees is that as soon as the front of the car enters the garage the garage man runs around to the back and opens the back door of the garage. From the car driver's point of view at NO time is the car simultaneously between BOTH of two closed and locked doors. * In the garage frame, the car is moving and thus contracting if you believe SR. If v is large enough, the car will fit in garage. Just apply the gamma factor. When you write about the "car driver", you're back in the car frame which you've already analyzed. And I don't see the logic of your underlined comment. AG *So there is no paradox, although the car driver and the garage man do not agree what is "simultaneous" and what is not."* Yes, we agree, at least to the extent that there's no paradox. So my analysis has changed, and you would know this if you had actually read it carefully. AG *John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* ?w1 -- 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/17753081-ccc3-4004-b4fc-dd4ac5525ef0n%40googlegroups.com.
