Re: SR cannot determine Contraction

On Feb 17, 1:55 am, Peri of Pera <rie...@xxxxxxxxxxx> wrote:
SR cannot determine Contraction

Lorentz proposed contraction of moving objects in a paper 'The
relative motion of the earth and the ether', Versl.Kon.Akad.Wetensch.
1, 74 in 1892 and then published the Lorentz transformation formulas
in 1899 according to which objects moving through space contract
parallel to the direction of motion and in proportion to their speed
[L'=L/sqrt(1-v^2/c^2)].

Is it not L *times* sqrt(...) ?

Einstein accepted the formulas but 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".

The real value of v in the formula is indeterminate i.e. the real
speed of a body is unknown.

Correct. The "v" in Lorentz work represents the "true" speed, the
speed relative to the ether (frame). As was well known since 1900,
this speed had (and has) no way to be determined and standard optical
and kinematical setups will not be able to detect it.


However, the speed relative to other
bodies may be known.

Do you mean "true" speed or *measured* speed? The true speed can not
be determined. The measured speed ( the now usual procedure-defined
speed) can be found (measured).


If body A moves relative to body B with a speed
of  200000km/sec,

You mean *measured* speed... ?

body A is seen by observers

Not "seen" but *measured* ?

on B to contract by L/sqrt(1-200000km/sec^2/c^2) and

Dont you mean L TIMES sqrt(...) ?

if body A moves at the same time
relative to body C with a speed of 100000km/sec it is seen

You mean *measured* ?

by observers on C to contract by L/sqrt(1-100000km/sec^2/c^2).

Dont you mean L TIMES sqrt(...) ?

Conclusion: SR is useless. It does not tell us anything about the
state and condition of  A, B or C but gives in every instance an
incorrect amount of the contraction of body A.
Peter Riedt

Its calculations (predictions) correctly predict experiments; is that
not useful?
.

Relevant Pages

  • Re: STR contraction
    ... 'The Visual Appearance of Rapidly Moving Objects' ... remains uncontracted but _calculates_ that it has incurred contraction ... the GA trajectory and velocity itself amounts to, ... Those photons of non-zero mass are surrounded and affected by gravity, ...
    (sci.physics.relativity)
  • Re: SR cannot determine Contraction
    ... relative motion of the earth and the ether', ... in 1899 according to which objects moving through space contract ... incorrect amount of the contraction of body A. ...
    (sci.physics.relativity)
  • Re: Finally, Special Relativity Is Proven False
    ... Do moving clocks run slow? ... measuring 1 meter in M is equal to a rod D' measuring 1 meter in N. ... contraction occurred when rod D was speeding at 0.995c relative to O, ... moving observers in relativity do not observe length contraction or ...
    (sci.physics.relativity)
  • Re: Travel faster than light
    ... Now imagine it moving along. ... situation in our pictures using "retardation" which is to say actually ... .so its just an optical illusion of an appearance of contraction or lengthening you are talking about. ...
    (sci.physics.relativity)
  • Re: SR fundamental contradiction
    ... The moving stick is measured to be longer in the S ... and the whole rest of the universe accelerating in the opposite ... accelerate an object is the same as the force needed to accelerate ... So the answer to your question is that the contraction of the universe ...
    (sci.physics.relativity)
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