Local and Global Anisotropy in the Speed of Light

Sorge, Francesco

doi:10.1007/978-94-017-0528-8_10

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…LCIFs are proposed to display isotropic light speed when measured at infinitesimal distances, below the level of experimental detection. 59,60 The integration of LCIFs over a full rotation is used to generate an overt Sagnac effect. However, these approaches do not generate the conventional Sag 2AS equation.…”

Section: Application Of the Lt To Rotating Framesmentioning

confidence: 99%

Assessment of the relativistic rotational transformations

Kipreos

Balachandran

2021

Mod. Phys. Lett. A

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Rotational transformations describe relativistic effects in rotating frames. There are four major kinematic rotational transformations: the Langevin metric; Post transformation; Franklin transformation; and the rotational form of the absolute Lorentz transformation. The four transformations exhibit different combinations of relativistic effects and simultaneity frameworks, and generate different predictions for relativistic phenomena. Here, the predictions of the four rotational transformations are compared with recent optical data that has sufficient resolution to distinguish the transformations. We show that the rotational absolute Lorentz transformation matches diverse relativistic optical and non-optical rotational data. These include experimental observations of length contraction, directional time dilation, anisotropic one-way speed of light, isotropic two-way speed of light, and the conventional Sagnac effect. In contrast, the other three transformations do not match the full range of rotating-frame relativistic observations.

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Section: Application Of the Lt To Rotating Framesmentioning

confidence: 99%

Assessment of the relativistic rotational transformations

Kipreos

Balachandran

2021

Mod. Phys. Lett. A

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“…Both SR and AST are considered to be compatible with light speed anisotropy in rotating reference frames, [75][76][77][78][79] which makes it difficult to use measurements of light speed in rotating frames to distinguish the two theories. In contrast, SR predicts light speed isotropy for measurements made within an IRF, while AST predicts light speed anisotropy.…”

Section: Ast Is Compatible With Light Speed Anisotropies Observed In mentioning

confidence: 99%

An approach to directly probe simultaneity

Kipreos

Balachandran

2016

Mod. Phys. Lett. A

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The theory of special relativity derives from the Lorentz transformation. The Lorentz transformation implies differential simultaneity and light speed isotropy. Experiments to probe differential simultaneity should be able to distinguish the Lorentz transformation from a kinematically-similar alternate transformation that predicts absolute simultaneity, the absolute Lorentz transformation. Here, we describe how published optical tests of light speed isotropy/anisotropy cannot distinguish between the two transformations. We show that the shared equations of the two transformations, from the perspective of the "stationary" observer, are sufficient to predict null results in optical resonator experiments and in tests of frequency changes in one-way light paths. In an influential 1910 exposition on differential simultaneity, Comstock described how a "stationary" observer would observe different clock readings for spatially-separated "moving" clocks. The difference in clock readings is an integral aspect of differential simultaneity. We derive the equation for the difference in clock readings and show that it is equivalent to the Sagnac correction that describes light speed anisotropies in satellite communications. We describe an experimental strategy that can measure the differences in spatially-separated clock times to allow a direct probe of the nature of simultaneity.

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“…A 'time gap', or 'discontinuity', must be introduced in order to account for the fact that pulses sent on a trip one way around the cylinder do not arrive at the starting point at the same time. In Eric's world, this time gap is the explanation of the Sagnac effect [20,21,26,27,31,38]. Any process that includes a complete circuit of the cylinder must incorporate such a time adjustment whether it involves light or matter waves or massive objects [39].…”

Section: Eric and The Time Gapmentioning

confidence: 99%

A relativistic rotating frame with physics majors, photons and mirrors: causality lost

West¹

2008

Eur. J. Phys.

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An analysis of cylinders rotating at relativistic speeds is considered from the point of view of observers living on the cylinders and from the point of view of observers in an inertial frame at rest with respect to translational motion of the cylinder. All of the observers measure time and distance using the recently introduced floor mirrored Einstein–Langevin light clock (FMEL). Two ‘obvious’ choices for synchronizing clocks, the traditional Einstein method and the well-known ‘global’ method, will be compared. It is shown that Selleri's paradox does not actually illustrate a contradiction, and it is shown that the Einstein method seems to allow apparent time ordering violations of causality. The global method leads to a disagreement with those in the inertial frame about velocities, and to a non-isotropic value for the speed of light. Ehrenfest's paradox is explained from the point of view of observers using each choice of synchronization.

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Local and Global Anisotropy in the Speed of Light

Cited by 3 publications

References 13 publications

Assessment of the relativistic rotational transformations

Assessment of the relativistic rotational transformations

An approach to directly probe simultaneity

A relativistic rotating frame with physics majors, photons and mirrors: causality lost

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