Re: Length Contraction in SR (again), aka Parking a Relativistic Car in a Garage

[Brent Meeker]

On 12/14/2024 10:21 PM, Alan Grayson wrote:


On Saturday, December 14, 2024 at 11:03:27 PM UTC-7 Brent Meeker wrote:




    On 12/14/2024 8:55 PM, Alan Grayson wrote:


    On Saturday, December 14, 2024 at 9:09:01 PM UTC-7 Brent Meeker
    wrote:




        On 12/14/2024 7:46 PM, Alan Grayson wrote:
        I meant I hadn't considered the ordering you postulated as
        effecting simultaneity. By "fit", I always meant the
        ordering you described, _and_ that the paradox is alive and
        well under such ordering. Moreover, I don't see why in the
        car frame we can't have the phenomenon synchronized with the
        garage frame, so the observers see the same thing, at the
        same time, which IMO implies a paradox. A'sG

        They can't see the same events at the same time because they
        are moving relative to one another and light has a finite
        velocity.

        Brent


    But there's only one phenomenon to observe, from different points
    of view.
    No, there's an event of  the front of the car exiting the garage
    and the event of the rear of the car entering the garage, two
    phenomena.

    Brent


In this situation, we have two frames, with clocks sychronized in each 
frame. Can the clocks be mutally synchronized, and if so, will the 
synchronization remain intact? If not, why not? TY, AG

You can synchronize the clocks when they are at rest relative to each 
other.  But when they've in motion they each see the other as running slow.

Brent

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