28 research outputs found
Testing Einstein's time dilation under acceleration using M\"ossbauer spectroscopy
The Einstein time dilation formula was tested in several experiments. Many
trials have been made to measure the transverse second order Doppler shift by
M\"{o}ssbauer spectroscopy using a rotating absorber, to test the validity of
this formula. Such experiments are also able to test if the time dilation
depends only on the velocity of the absorber, as assumed by Einstein's clock
hypothesis, or the present centripetal acceleration contributes to the time
dilation. We show here that the fact that the experiment requires -ray
emission and detection slits of finite size, the absorption line is broadened;
by geometric longitudinal first order Doppler shifts immensely. Moreover, the
absorption line is non-Lorenzian. We obtain an explicit expression for the
absorption line for any angular velocity of the absorber.
The analysis of the experimental results, in all previous experiments which
did not observe the full absorption line itself, were wrong and the conclusions
doubtful. The only proper experiment was done by K\"{u}ndig (Phys. Rev. 129
(1963) 2371), who observed the broadening, but associated it to random
vibrations of the absorber. We establish necessary conditions for the
successful measurement of a transverse second order Doppler shift by
M\"{o}ssbauer spectroscopy. We indicate how the results of such an experiment
can be used to verify the existence of a Doppler shift due to acceleration and
to test the validity of Einstein's clock hypothesis.Comment: 11 pages, 4 figure
Novel Moessbauer experiment in a rotating system and the extra-energy shift between emission and absorption lines
We present the results of a novel Mossbauer experiment in a rotating system,
implemented recently in Istanbul University, which yields the coefficient
k=0.69+/-0.02 within the frame of the expression for the relative energy shift
between emission and absorption lines dE/E=ku2/c2. This result turned out to be
in a quantitative agreement with an experiment achieved earlier on the subject
matter (A.L. Kholmetskii et al. 2009 Phys. Scr. 79 065007), and once again
strongly pointed to the inequality k>0.5, revealed originally in (A.L.
Kholmetskii et al. 2008 Phys. Scr. 77, 035302 (2008)) via the re-analysis of
Kundig experiment (W. Kundig. Phys. Rev. 129, 2371 (1963)). A possible
explanation of the deviation of the coefficient k from the relativistic
prediction k=0.5 is discussed.Comment: 21 pages, 8 figures, 3 table
The Limits of Special Relativity
The Special Theory of Relativity and the Theory of the Electron have had an
interesting history together. Originally the electron was studied in a non
relativistic context and this opened up the interesting possibility that lead
to the conclusion that the mass of the electron could be thought of entirely in
electromagnetic terms without introducing inertial considerations. However the
application of Special Relativity lead to several problems, both for an
extended electron and the point electron. These inconsistencies have, contrary
to popular belief not been resolved satisfactorily today, even within the
context of Quantum Theory. Nevertheless these and subsequent studies bring out
the interesting result that Special Relativity breaks down within the Compton
scale or when the Compton scale is not neglected. This again runs contrary to
an uncritical notion that Special Relativity is valid for point particles.Comment: 13 pages,Te
Comment on `Electromagnetic force on a moving dipole'
Using the Lagrangian formalism, the electromagnetic force on a moving dipole
derived by Kholmetskii, Missevitch and Yarman (2011, Eur. J. Phys. 32, 873) is
found to be missing some important terms.Comment: The version as accepted by Eur. J. Phys.; 4 page
The Lorentz transformations of the vectors E, B, P, M and the external electric fields from a stationary superconducting wire with a steady current and from a stationary permanent magnet
In the first part of this paper we review the fundamental difference between
the usual transformations of the three-dimensional (3D) vectors of the electric
field , the magnetic field , the polarization
, the magnetization and the Lorentz transformations of
the 4D geometric quantities, vectors E, B, P, M, with many additional
explanations and several new results. In the second part, we have discussed the
existence of the electric field vector E outside a stationary superconducting
wire with a steady current and also different experiments for the detection of
such electric fields. Furthermore, a fundamental prediction of the existence of
the external electric field vector E from a stationary permanent magnet is
considered. These electric fields are used for the resolution of the
"charge-magnet paradox" with 4D geometric quantities for a qualitative
explanation of the Aharonov-Bohm effect in terms of fields and not, as usual,
in terms of the vector potential and for a qualitative explanation that the
particle interference is not a test of a Lorentz-violating model of
electrodynamics according to which a magnetic solenoid generates not only a
static magnetic field but also a static electric field.Comment: 57 pages, minor changes, this version will be published in the
Proceedings of the IARD 201
Is the Theory of Relativity Self-consistent?
This paper is in certain contrast with the majority view that the relativistic theory is an internally consistent theory, which can only be falsified by experimen