عنوان مجله
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EUROPEAN PHYSICAL JOURNAL C
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چکیده
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The Sagnac effect is usually considered as being
a relativistic effect produced in an interferometer when
the device is rotating. General relativistic explanations are
known and already widely explained in many papers. Such
general relativistic approaches are founded on Einstein’s
equivalence principle (EEP), which states the equivalence
between the gravitational “force” and the pseudo-force experienced
by an observer in a non-inertial frame of reference,
included a rotating observer. Typically, the authors consider
the so-called Langevin-Landau-Lifschitz metric and the path
of light is determined by null geodesics. This approach partially
hides the physical meaning of the effect. It seems indeed
that the light speed varies by c±ωr in one or the other direction
around the disk. In this paper, a slightly different general
relativistic approach will be used. The different “gravitational
field” acting on the beam splitter and on the two rays of light
is analyzed. This different approach permits a better understanding
of the physical meaning of the Sagnac effect.
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