Groups > sci.physics.relativity > #391109

Re: a thought on the garage paradox

From	Sylvia Else <sylvia@not.at.this.address>
Newsgroups	sci.physics.relativity
Subject	Re: a thought on the garage paradox
Date	2016-08-28 22:35 +1000
Message-ID	<e2g43oFae5bU1@mid.individual.net> (permalink)
References	<a8bdb078-f117-4f80-a9a8-c63cfada9518@googlegroups.com>

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On 25/08/2016 8:31 AM, RichD wrote:
> Let's consider the Corvette in the garage scenario, again -
>
> The Vette drives through at high speed, it fits inside,
> or not, the garage is too shallow, blah blah, the usual.
>
> To be specific, irrespective of particular numbers:
>
> The garage doors are oriented north-south, normally
> open, the car approaches from the south.
> The garage's center point is clearly marked.  The
> driver is centered within the vehicle.  Two cameras
> are posted at the driver's seat, facing fore and aft.
>
> I)    In the garage frame:
>     The car approaches, enters, then completely inside.
> Both doors close simultaneously at the moment the driver
> passes the center, then very quickly open, and the car transits.
>
>
> II)   In the Corvette's frame:
>     The car is stationary, the garage approaches
> (so to speak), the open front door rolls over the
> front fender, the rear door closes, then quickly
> opens. The driver passes the center; at this moment,
> the car extends through both open doorways, by equal
> amount.  The Vette continues forward, the rear fender
> crosses through the front doorway, which then closes, etc.
>
> So far, so standard.
>
> Now, what do the cameras record?  These are unique
> to both frames, nothing 'relative' there!  (I rule
> out the 'many worlds' interpretation of QM)  In
> particular, what goes on film, at the instant the
> driver hits the center point?
>
> Facing north, the camera sees the front fender interior
> to the garage.  Though, from the car's frame, this is
> counter-intuitive, it must be so, for logical consistency.
>
> However, facing south, I don't see any such tautology;
> it appears the rear fender may be seen either in or
> outside the garage.
>
> Thus the analysis indicates an unexpected asymmetry.
> Am I missing something here?
>
> --
> Rich
>
You don't seem to made any allowance for the time it takes for light to 
get from the event being observed and arriving at the camera. Usually, 
one ignores such things, but at the kinds of speeds we're talking about 
here, it's important.

I posted an mathematical analysis of the barn and pole paradox with 
cameras some while back

<https://groups.google.com/d/msg/sci.physics.relativity/iuBoRUD4-kE/bF0BsiTDWAUJ>

and showed that everything works out fine.

Sylvia.

Thread

a thought on the garage paradox RichD <r_delaney2001@yahoo.com> - 2016-08-24 15:31 -0700
  Re: a thought on the garage paradox Poutnik <poutnik4nntp@gmail.com> - 2016-08-25 02:52 +0200
    Re: a thought on the garage paradox mlwozniak@wp.pl - 2016-08-24 23:35 -0700
      Re: a thought on the garage paradox Python <python@org.invalid> - 2016-08-25 12:20 +0200
        Re: a thought on the garage paradox mlwozniak@wp.pl - 2016-08-25 03:33 -0700
          Re: a thought on the garage paradox John Gogo <jfgogo22@yahoo.com> - 2016-08-29 19:55 -0700
            Re: a thought on the garage paradox John Gogo <jfgogo22@yahoo.com> - 2016-08-29 19:59 -0700
              Re: a thought on the garage paradox John Gogo <jfgogo22@yahoo.com> - 2016-08-29 20:02 -0700
      Re: a thought on the garage paradox JanPB <filmart@gmail.com> - 2016-08-29 15:49 -0700
        Re: a thought on the garage paradox Poutnik <poutnik4nntp@gmail.com> - 2016-08-30 10:34 +0200
          Re: a thought on the garage paradox mlwozniak@wp.pl - 2016-08-30 01:48 -0700
            Re: a thought on the garage paradox JanPB <filmart@gmail.com> - 2016-08-30 11:38 -0700
              Re: a thought on the garage paradox mlwozniak@wp.pl - 2016-08-30 23:13 -0700
                Re: a thought on the garage paradox JanPB <filmart@gmail.com> - 2016-09-01 11:51 -0700
                Re: a thought on the garage paradox Maciej Woźniak <mlwozniak@wp.pl> - 2016-09-01 22:08 +0200
                Re: a thought on the garage paradox JanPB <filmart@gmail.com> - 2016-09-01 15:25 -0700
    Re: a thought on the garage paradox RichD <r_delaney2001@yahoo.com> - 2016-08-27 20:55 -0700
      Re: a thought on the garage paradox Poutnik <poutnik4nntp@gmail.com> - 2016-08-28 06:44 +0200
      Re: a thought on the garage paradox Poutnik <poutnik4nntp@gmail.com> - 2016-08-28 07:05 +0200
      Re: a thought on the garage paradox Poutnik <poutnik4nntp@gmail.com> - 2016-08-28 07:48 +0200
  Re: a thought on the garage paradox Sylvia Else <sylvia@not.at.this.address> - 2016-08-28 22:35 +1000
    Re: a thought on the garage paradox "David (Time Lord) Fuller" <fuller.david@hotmail.com> - 2016-08-28 08:51 -0700
      Re: a thought on the garage paradox "David (Time Lord) Fuller" <fuller.david@hotmail.com> - 2016-08-28 09:05 -0700
        Re: a thought on the garage paradox "David (Time Lord) Fuller" <fuller.david@hotmail.com> - 2016-08-28 09:26 -0700
    Re: a thought on the garage paradox RichD <r_delaney2001@yahoo.com> - 2016-08-29 15:04 -0700
      Re: a thought on the garage paradox Sylvia Else <sylvia@not.at.this.address> - 2016-08-30 12:42 +1000
        Re: a thought on the garage paradox RichD <r_delaney2001@yahoo.com> - 2016-08-30 14:28 -0700
          Re: a thought on the garage paradox Sylvia Else <sylvia@not.at.this.address> - 2016-08-31 11:23 +1000
            Re: a thought on the garage paradox benj <benj@nobody.net> - 2016-08-30 21:45 -0400
              Re: a thought on the garage paradox Sylvia Else <sylvia@not.at.this.address> - 2016-08-31 12:20 +1000
                Re: a thought on the garage paradox mlwozniak@wp.pl - 2016-08-30 23:15 -0700
                Re: a thought on the garage paradox RichD <r_delaney2001@yahoo.com> - 2016-09-01 11:12 -0700
                Re: a thought on the garage paradox Sylvia Else <sylvia@not.at.this.address> - 2016-09-02 13:46 +1000
  a thought on the garage paradox "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2016-09-02 08:31 -0700
    Re: a thought on the garage paradox Dirk Van de moortel <dirkvandemoortel@hotspam.not> - 2016-09-02 19:03 +0200
      Re: a thought on the garage paradox "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2016-09-02 16:58 -0700
        Re: a thought on the garage paradox "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2016-09-02 19:32 -0700
          Re: a thought on the garage paradox "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2016-09-02 20:00 -0700

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