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Article #5516

Re: SR cannot determine Contraction

#5516
From: Yanick Toutain
Date: Fri, 22 Feb 2008 07:22
59 lines
4429 bytes
On Feb 22, 7:36 am, Pentcho Valev <pva...@yahoo.com> wrote:
> On Feb 22, 5:35 am, Tom Roberts <tjroberts...@sbcglobal.net> wrote in
> sci.physics.relativity:
>
> > Peri of Pera wrote:
> > > [... rephrasing of various aspects of my earlier statements]
>
> > Yes.
>
> > > The measurements of the coordinate points of a moving object by an
> > > observer and applying the Lorentz contraction formula does not
> > > constitute a valid measurement.
>
> > Hmmm. Making a measurement of the length of a moving object in the usual
> > way DOES constitute a valid measurement, and one obtains the "contracted
> > value". The "usual way" means having pre-positioned assistants mark the
> > endpoints of the moving object simultaneously in the observer's frame,
> > and then measuring the distance between the marks using rulers at rest
> > in the observer's frame.
>
> Roberts Roberts you are still a freshman among hypnotists in Einstein
> criminal cult and do not have the courage to give breathtaking
> examples when explaining length contraction. Superior brothers replace
> "marking the endpoints of the moving object simultaneously in the
> observer's frame" with "closing both doors simultaneously" and so they
> can trap a long train inside a short tunnel:
>
> http://www.youtube.com/watch?v=VSRIyDfo_mY&mode=related&search=
>
> and also a 80m long pole inside a 40m long barn:
>
> http://www.math.ucr.edu/home/baez/physics/Relativity/SR/barn_pole.html
> "These are the props. You own a barn, 40m long, with automatic doors
> at either end, that can be opened and closed simultaneously by a
> switch. You also have a pole, 80m long, which of course won't fit in
> the barn....So, as the pole passes through the barn, there is an
> instant when it is completely within the barn. At that instant, you
> close both doors simultaneously, with your switch. Of course, you open
> them again pretty quickly, but at least momentarily you had the
> contracted pole shut up in your barn."
>
> So Roberts Roberts, by trapping long things inside short things,
> superior brothers are able to demonstrate the real grandeur of
> Einstein's discoveries.
>
> Pentcho Valev
> pva...@yahoo.com

Pentcho, avez vous lu ma page sur l'équation qui prend la place de la
transformation de Lorentz avec un temps absolu, des vitesses absolues
et un délai de signal ?
http://site.voila.fr/monsyte/de/SCIENCES/scphys/COURS/objectif/Cours_de_science_objective_Les_equations.htm

Could you translate for English readers ?
Please
YT
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From: Yanick Toutain <YanickToutain@gmail.com>
Newsgroups: sci.physics.relativity,sci.physics,fr.sci.physique,fr.sci.maths,fr.sci.philo
Subject: Re: SR cannot determine Contraction
Date: Thu, 21 Feb 2008 23:22:20 -0800 (PST)
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