The
Transverse Doppler Effect and the Relativity Principle
Experimental Test of Length Contraction
2014-08-12
Relativity and Gravity Publication - No. 15
Buenker
Robert J.
Prof. Dr.
Buenker, Robert J.
aut
en
<p> The second-order or transverse Doppler effect (TDE) demonstrates that both the periods
and wavelengths of radiation increase (after the non-relativistic first-order effect has been
eliminated) when a light source is accelerated relative to the observer. It is pointed out that the
fact that an observer traveling with the light source does not detect any change in either quantity,
in accord with the relativity principle (RP), implies not only that there has been a corresponding
increase in the periods of all naturally occurring processes in his rest frame but also a uniform
<i>expansion</i> in the dimensions of all objects co-moving with him. These results constitute a key
verification of Einsteinean time dilation, but it has not been recognized that they also stand in
contradiction to another fundamental prediction of the special theory of relativity (SR), the
Fitzgerald-Lorentz contraction effect (FLC). A survey of past claims for the validity of the FLC
shows that they are either based on Gedanken experiments or on a specious interpretation of
lifetime measurements for accelerated metastable particles. The manner in which the FLC is
derived from the Lorentz transformation (LT) is then discussed and it is noted that it is based on a
generalization of the original interpretation of its space-time variables in terms of elapsed times
and distances traveled by a given object, and therefore requires separate experimental verification
than observations of the constancy of the speed of light. Experimentation with the Global
Positioning System (GPS) is shown to be consistent with the TDE results and thus verifies the
conclusion that isotropic length expansion accompanies time dilation, not the type of anisotropic
length contraction (FLC) indicated by the LT.
2014-08-12T08:33:18.846Z
2014-08-12T09:21:02.964Z
published
Pub