SR cannot determine Contraction

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)]. 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. However, the speed relative to other
bodies may be known. If body A moves relative to body B with a speed
of 200000km/sec, body A is seen by observers on B to contract by L/
sqrt(1-200000km/sec^2/c^2) and if body A moves at the same time
relative to body C with a speed of 100000km/sec it is seen by
observers on C to contract by L/sqrt(1-100000km/sec^2/c^2).

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

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Relevant Pages

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  • Re: SR cannot determine Contraction
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