On the Anistropy of the Speed of Light on a Rotating Platform

Ghosal, Sanjoy; Raychaudhuri, Biplab; Chowdhury, Anjan Kumar; Sarker, M.

doi:10.1023/b:fopl.0000042698.27763.0b

Cited by 11 publications

(15 citation statements)

References 24 publications

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“…The reader who has worked out (24)- (27) realizes that the centrifugal acceleration arises from the g tt term in the metric, whereas the zeroth order Coriolis term in (27) is due solely to the first order time-space component g tφ in the metric (22). Without that off-diagonal component due to non-time-orthogonal (NTO) rotating coordinates, we would find no measurable Coriolis acceleration in rotation.…”

Section: Radial Direction Accelerationmentioning

confidence: 91%

“…Ghosal et al (22) provide one critique of the desynchronization approach, and we discuss it in Sec. 8.2. An older argument purporting to explain the time gap likens it to traveling at constant radius in a polar coordinate system, for which the φ value is discontinuous at 360 • (or multivalued.)…”

Section: Traditional Theory Approaches To Resolving the "Time Gap"mentioning

confidence: 99%

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Relativistic Rotation: A Comparison of Theories

Klauber¹

2007

Found Phys

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Alternative theories of relativistic rotation considered viable as of 2004 are compared in the light of experiments reported in 2005. En route, the contentious issue of simultaneity choice in rotation is resolved by showing that only one simultaneity choice, the one possessing continuous time, gives rise, via the general relativistic equation of motion, to the correct Newtonian limit Coriolis acceleration. In addition, the widely dispersed argument purporting Lorentz contraction in rotation and the concomitant curved surface of a rotating disk is analyzed and argued to be lacking for more than one reason. It is posited that not by theoretical arguments, but only via experiment can we know whether such effect exists in rotation or not. The Coriolis/simultaneity correlation, and the results of the 2005 experiments, support the Selleri theory as being closest to the truth, though it is incomplete in a more general applicability sense, because it does not provide a global metric. Two alternatives, a modified Klauber approach and a Selleri-Klauber hybrid, are presented which are consistent with recent experiment and have a global metric, thereby making them applicable to rotation problems of all types.Comment: 45 pages including 11 figures and one table. Revision includes suggestions by reviewer

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Section: Radial Direction Accelerationmentioning

confidence: 91%

Section: Traditional Theory Approaches To Resolving the "Time Gap"mentioning

confidence: 99%

Relativistic Rotation: A Comparison of Theories

Klauber¹

2007

Found Phys

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“…From the realistic point of view, which I defend, reducing physics to human manipulations is a bad choice, which finds some of its roots in the Machian influences from which the the theory of relativity arose. A more detailed discussion of the rotating platform argument from different points of view can be found in two papers recently published in this journal [18,19].…”

Section: The Weak Relativity Principlementioning

confidence: 99%

The Inertial Transformations and the Relativity Principle

Selleri

2005

Found Phys Lett

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Our recently proposed inertial transformations of the space and time variables based on absolute simultaneity imply the exist;ence of a single isotropic inertial reference system ("privileged system"). We show, however, that a resynchronization of clocks in all inertial systems is possible leading to a different, arbitrarily chosen, isotropic "privileged" system. Such a resynchronization does not modify any one of the empirical consequences of the theory, which is thus compatible with a formulation of the relativity principle weaker than adopted in Einstein's theory of special relativity.Key words: special relativity, clock synchronization, inertial transformations. THE INERTIAL TRANSFORMATIONSAccording to Poincare [1], Reichenbach [2], Jammer [3], and Mansouri and Sexl [4], the clock synchronisation in inertial systems is conventional, and the choice of the invariance of the one way velocity of light made in the TSR was based on reasons of simplicity. In [5] I showed that a suitable parameter ei can be introduced to allow for different synchronizations in the transformations of the space and time variables. The TSR is obtained for a particular nonzero value of ei.These developments are briefly reviewed in the present section. I also found, however, that ei = 0 (absolute simultaneity) is the only choice allowing for a treatment of accelerations rationally connected with the physics of inertial systems. This result is also recalled below.Given the inertial frames ^o and S one can set up Cartesian

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“…Several attempts have been made to resolve this issue (Rizzi & Tartaglia, 1998, 1999Budden, 1998;Minguzzi, 2002;Ghosal et al, 2004) but Selleri in a later paper (Selleri, 2004a) reaffirmed the legitimacy of the finding ρ ≠ 1. He sought a resolution of this problem (Selleri, 2010) by examining the most general set of space-time transformations which satisfy the experimentally observed conditions of constant two-way light speed and time dilation and which differ only by a clock synchronization parameter e 1 .…”

Section: Discussionmentioning

confidence: 99%

Light Transmission and the Sagnac Effect on the Rotating Earth

Gift¹

2013

APR

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Light transmission on the surface of the rotating Earth is examined using the Langevin metric of general relativity. It is shown that this metric which yields the rigorously tested and verified algorithm for clock synchronization in the Global Positioning System (GPS) also predicts east-west light speed anisotropy that is inconsistent with light speed isotropy postulated to hold at a local level on the rotating Earth. This light speed anisotropy is further demonstrated using experimentally confirmed light travel time in a simple speed calculation as well as the classical method of light speed relative to a terrestrial observer rotating with the Earth for light travel in the Earth-Centred Inertial (ECI) frame. These theoretical results are confirmed by experimental findings from GPS measurements and lead to the re-interpretation of the Sagnac effect normally treated as a time correction in GPS operation.

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On the Anistropy of the Speed of Light on a Rotating Platform

Cited by 11 publications

References 24 publications

Relativistic Rotation: A Comparison of Theories

Relativistic Rotation: A Comparison of Theories

The Inertial Transformations and the Relativity Principle

Light Transmission and the Sagnac Effect on the Rotating Earth

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