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Old September 4th 05 posted to sci.physics,sci.physics.relativity
Sam Wormley
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Posts: 16,743
Default Physical Interpretations of Relativity Theory (Winterberg, 2004)

Perspicacious wrote:

It is very unlikely that special relativity is wrong in
the macroscopic realm. The greatest evidence for special
relativity is that it can be derived only from Newton's
first law of motion and the homogeneity of time:


Special Relativity show that time and space are malleable.

See: http://www.fourmilab.ch/etexts/einstein/specrel/www/

ON THE ELECTRODYNAMICS
OF MOVING BODIES
By A. Einstein
June 30, 1905

It is known that Maxwell's electrodynamics--as usually understood at
the present time--when applied to moving bodies, leads to asymmetries
which do not appear to be inherent in the phenomena. Take, for example,
the reciprocal electrodynamic action of a magnet and a conductor. The
observable phenomenon here depends only on the relative motion of the
conductor and the magnet, whereas the customary view draws a sharp
distinction between the two cases in which either the one or the other
of these bodies is in motion. For if the magnet is in motion and the
conductor at rest, there arises in the neighbourhood of the magnet an
electric field with a certain definite energy, producing a current at
the places where parts of the conductor are situated. But if the magnet
is stationary and the conductor in motion, no electric field arises in
the neighbourhood of the magnet. In the conductor, however, we find an
electromotive force, to which in itself there is no corresponding
energy, but which gives rise--assuming equality of relative motion in
the two cases discussed--to electric currents of the same path and
intensity as those produced by the electric forces in the former case.

Examples of this sort, together with the unsuccessful attempts to
discover any motion of the earth relatively to the ``light medium,''
suggest that the phenomena of electrodynamics as well as of mechanics
possess no properties corresponding to the idea of absolute rest. They
suggest rather that, as has already been shown to the first order of
small quantities, the same laws of electrodynamics and optics will be
valid for all frames of reference for which the equations of mechanics
hold good.1 We will raise this conjecture (the purport of which will
hereafter be called the ``Principle of Relativity'') to the status of a
postulate, and also introduce another postulate, which is only
apparently irreconcilable with the former, namely, that light is always
propagated in empty space with a definite velocity c which is
independent of the state of motion of the emitting body. These two
postulates suffice for the attainment of a simple and consistent theory
of the electrodynamics of moving bodies based on Maxwell's theory for
stationary bodies. The introduction of a ``luminiferous ether'' will
prove to be superfluous inasmuch as the view here to be developed will
not require an ``absolutely stationary space'' provided with special
properties, nor assign a velocity-vector to a point of the empty space
in which electromagnetic processes take place.

The theory to be developed is based--like all electrodynamics--on the
kinematics of the rigid body, since the assertions of any such theory
have to do with the relationships between rigid bodies (systems of
co-ordinates), clocks, and electromagnetic processes. Insufficient
consideration of this circumstance lies at the root of the difficulties
which the electrodynamics of moving bodies at present encounters.

__________________________________________


There has *never* been a prediction of special relativity that was
contradicted by an observation. *Never!*
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