🚀 go-pugleaf

On Feb 22, 1:36 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

Maybe you need to stop worrying about those things that change under
the LT and start thinking about the invariants.  That's where the real
physics actually lies.  Too bad you don't understand it.