Re: The Measurement of Contraction

On Feb 9, 12:54 pm, "jeckyl" <no...@xxxxxxxxxxx> wrote:
"Peri of Pera" <rie...@xxxxxxxxxxx> wrote in messagenews:9ff5f418-199c-4055-9aaa-8d752768da0c@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

On Feb 8, 9:25 am, "jeckyl" <no...@xxxxxxxxxxx> wrote:
"Peri of Pera" <rie...@xxxxxxxxxxx> wrote in
messagenews:68d664bf-7cbc-4725-97c7-b271ca2df145@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

The Measurement of Contraction

Jecko,
Your version of SR is a very strange one.

No .. it is the standard one.  Maybe that's why you think it is strange,
because you don't understand SR.

I said: Physical objects (we may call them frames) that are
capable of motion (cars, trains, planes, the earth, planets, stars)
will
shrink along the axis parallel to the motion and have their clocks
slow down.

No .. they don't shrink or have their clock slowed .. nothing happens ot the
object.  Like when you hear a whistle from a moving train, the sounds is a
different pitch.  Does that mean something happened to the whistle on the
train itself .. no .. its still got the same pitch as always .. it is just
an observer measures/hears the pitch as different.

You replied: No .. nothing happens to the object .. it can't do.

That's right

Someone moving
quickly past you does not change you.

That's right

But something happens to how
they are measured by things that move relative to them.

Nothing 'happens to' how they are measured .. that's just how how much
spacetime the moving object occupies.

Einstein writes in 1916 (Relativity: The Special and General Theory,
Chapter 16):  "The contraction of moving bodies follows from the two
fundamental principles of the theory". This statement by AE is
unqualified. It does not assume as you do that something happens to
moving bodies because they are measured by things that move relative
to them.

No .. that was *your* assumption .. I said the *nothing* happens.  Can't you
even read what was written?

Utter nonsense.

Yes .. what you wrote was utter nonsense.

Don't try to re-interpret SR in order to
defend it and study it before you lecture on it.

I am not reintpretting SR.  *You* are the one trying to do so, even though
you have problems understanding it.  What I say is completely in line with
what SR says.  There is no change to the proper length and time of a body
when an observer is moving relative to it.  Ther eis a difference in the
measured length and times by the moving observer .. that is call 'length
contraction' and 'time dilation' (and don't forget the simultaneity effects)
.. That is what Einstein was talking about.  That contraction .. the shorter
measurement of length .. is real.  The object *really does* take up less
physical space at a given time in the observer's frame of reference .. and
that is what we are talking about when we talk about measured length.

Jecko,
you have no arguments only assertions: Yes it does, No it doesn't - ad
nauseam.

Lorentz contraction hypothesis states that bodies moving through space
contract along the direction of motion. Einstein adopted this
position. This is Let and SR.

Your denial of this fact is just childish. But worse is the number of
times you repeat it.
Peter Riedt
.

Relevant Pages

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