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Re: Clarification Needed Please.

From "HGW, DSc." <HG@....>
Newsgroups sci.physics.relativity
Subject Re: Clarification Needed Please.
Date 2017-09-26 03:53 +1000
Organization Aioe.org NNTP Server
Message-ID <oqbfqe$4vr$1@gioia.aioe.org> (permalink)
References <oq9i5e$umt$1@gioia.aioe.org> <f2r3v6FbbjvU1@mid.individual.net> <oqa4vc$1m16$1@gioia.aioe.org> <oqap98$ie$1@news.albasani.net>

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On 25/09/17 21:28, Paul B. Andersen wrote:
> Den 25.09.2017 07.42, skrev HGW:
>> My main concern is about the worldline of the source.
>> It must also change 
> 
> Its projection into frame 2 is obviously different
> from its projection into frame 1.
> 
> 
> An arbitrary event on the world line of the source:
> 
> Frame 1: (source stationary)
> 
>   x = 0, t = t
> 
> Frame 2:
> 
>   t' = t/sqrt(1-v^2/c^2)
>   x' = -vt/sqrt(1-v^2/c^2)

Can you explain why the x coordinate should become LARGER in the moving 
frame when moving rods are supposed to shorten? Some readers might want 
to know.

How is it that the equation is not x' = -vt*sqrt(1-v^2/c^2)

If moving clocks run slow and moving rods shorten, how does that 
translate into both coordinates of the X-T diagram changing in the same 
sense? This is not obvious and some readers might want more information.

>   The world line: x' = vt'
> 
>   dx'/dt' = -v
> 
> ... which means that the source and frame 1 is moving at
>     the speed v in the negative x' direction in frame 2.
> 
>> ....which means Frame 1 is not moving at v according to an observe at 
>> rest in frame 2 
> 
> Down under upside down logic? :-D

If moving spatial intervals become smaller and moving time intervals 
become longer, the X-T coordinates will not change by the same factor.
Some readers might be confused by this.
If a time interval becomes longer, such as that defined by the period of 
an oscillator which drives a clock, that would cause the clock to run 
slow and the T coordinate to lengthen. CMIIW.
Are we viewing the Frame 2 coordinates from the POV of frame 1? Some 
readers might be confused about all this.

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Thread

Clarification Needed Please. HGW <HW@home.net> - 2017-09-25 10:21 +1000
  Re: Clarification Needed Please. "David (Kronos Prime) Fuller" <fuller.david@hotmail.com> - 2017-09-24 17:30 -0700
    Re: Clarification Needed Please. "David (Kronos Prime) Fuller" <fuller.david@hotmail.com> - 2017-09-24 17:53 -0700
      Re: Clarification Needed Please. "David (Kronos Prime) Fuller" <fuller.david@hotmail.com> - 2017-09-24 18:03 -0700
        Re: Clarification Needed Please. "David (Kronos Prime) Fuller" <fuller.david@hotmail.com> - 2017-09-24 18:06 -0700
          Re: Clarification Needed Please. "David (Kronos Prime) Fuller" <fuller.david@hotmail.com> - 2017-09-24 18:12 -0700
  Re: Clarification Needed Please. Sylvia Else <sylvia@not.at.this.address> - 2017-09-25 11:20 +1000
    Re: Clarification Needed Please. HGW <HW@home.net> - 2017-09-25 15:42 +1000
      Re: Clarification Needed Please. Sylvia Else <sylvia@not.at.this.address> - 2017-09-25 20:19 +1000
      Re: Clarification Needed Please. "Paul B. Andersen" <relativity@paulba.no> - 2017-09-25 13:28 +0200
        Re: Clarification Needed Please. Sylvia Else <sylvia@not.at.this.address> - 2017-09-25 21:29 +1000
          Re: Clarification Needed Please. "Paul B. Andersen" <relativity@paulba.no> - 2017-09-25 15:00 +0200
            Re: Clarification Needed Please. "HGW, DSc." <HG@....> - 2017-09-26 03:55 +1000
            Re: Clarification Needed Please. "Paul B. Andersen" <relativity@paulba.no> - 2017-09-25 22:43 +0200
          Re: Clarification Needed Please. Lofty Goat <rlwatkins@gmail.com> - 2017-09-27 19:45 -0500
            Re: Clarification Needed Please. Sylvia Else <sylvia@not.at.this.address> - 2017-09-28 13:00 +1000
              Re: Clarification Needed Please. Lofty Goat <rlwatkins@gmail.com> - 2017-10-15 10:54 -0500
        Re: Clarification Needed Please. "HGW, DSc." <HG@....> - 2017-09-26 03:53 +1000
          Re: Clarification Needed Please. Kos Etrakis <uar@ksskkwi.ck> - 2017-09-25 17:55 +0000
          Re: Clarification Needed Please. "Paul B. Andersen" <relativity@paulba.no> - 2017-09-25 22:40 +0200
            Re: Clarification Needed Please. "Paul B. Andersen" <relativity@paulba.no> - 2017-09-25 22:43 +0200
            Re: Clarification Needed Please. HGW <HW@home.net> - 2017-09-26 11:42 +1000
              Re: Clarification Needed Please. Gary Harnagel <hitlong@yahoo.com> - 2017-09-26 04:37 -0700
              Re: Clarification Needed Please. "Paul B. Andersen" <relativity@paulba.no> - 2017-09-26 14:45 +0200
                Re: Clarification Needed Please. HGW <HW@home.net> - 2017-09-27 08:16 +1000
                Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-27 00:27 +0200
                Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-27 00:32 +0200
                Re: Clarification Needed Please. HGW <HW@home.net> - 2017-09-27 08:45 +1000
                Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-27 00:53 +0200
                Re: Clarification Needed Please. HGW <HW@home.net> - 2017-09-27 10:51 +1000
                Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-27 11:55 +0200
                Re: Clarification Needed Please. "Paul B. Andersen" <relativity@paulba.no> - 2017-09-27 14:59 +0200
                Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-27 09:27 +0200
                Re: Clarification Needed Please. "Paul B. Andersen" <relativity@paulba.no> - 2017-09-27 19:06 +0200
                Re: Clarification Needed Please. HGW <HW@home.net> - 2017-09-28 08:47 +1000
                Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-28 03:30 +0200
                Re: Clarification Needed Please. "Paul B. Andersen" <relativity@paulba.no> - 2017-09-28 15:00 +0200
                Re: Clarification Needed Please. "Paul B. Andersen" <relativity@paulba.no> - 2017-09-27 14:56 +0200
  Re: Clarification Needed Please. "Paul B. Andersen" <relativity@paulba.no> - 2017-09-25 12:38 +0200
    Re: Clarification Needed Please. "HGW, DSc." <HG@....> - 2017-09-26 03:58 +1000
    Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-26 16:42 +0200
      Re: Clarification Needed Please. Dirk Van de moortel <dirkvandemoortel@hotspam.not> - 2017-09-26 16:56 +0200
      Re: Clarification Needed Please. "Paul B. Andersen" <relativity@paulba.no> - 2017-09-26 20:17 +0200
        Re: Clarification Needed Please. Dirk Van de moortel <dirkvandemoortel@hotspam.not> - 2017-09-26 20:45 +0200
          Re: Clarification Needed Please. "Paul B. Andersen" <relativity@paulba.no> - 2017-09-26 22:04 +0200
            Re: Clarification Needed Please. Dirk Van de moortel <dirkvandemoortel@hotspam.not> - 2017-09-26 22:36 +0200
              Re: Clarification Needed Please. HGW <HW@home.net> - 2017-09-27 08:30 +1000
                Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-27 00:50 +0200
                Re: Clarification Needed Please. HGW <HW@home.net> - 2017-09-27 10:55 +1000
                Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-27 03:16 +0200
                Re: Clarification Needed Please. HGW <HW@home.net> - 2017-09-27 19:47 +1000
                Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-27 09:30 +0200
        Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-26 23:54 +0200
          Re: Clarification Needed Please. HGW <HW@home.net> - 2017-09-27 08:33 +1000
            Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-27 01:00 +0200
              Re: Clarification Needed Please. HGW <HW@home.net> - 2017-09-27 11:01 +1000
                Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-27 03:19 +0200
                Re: Clarification Needed Please. HGW <HW@home.net> - 2017-09-27 19:53 +1000
                Re: Clarification Needed Please. Gerard Hermes <aluua@nwaau.fb> - 2017-09-27 10:39 +0000
                Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-27 09:46 +0200
                Re: Clarification Needed Please. HGW <HW@home.net> - 2017-09-28 09:09 +1000
                Re: Clarification Needed Please. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-09-28 02:48 +0200

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