Parallax distance, time, and the twin ’’paradox’’

Unruh, W. G.

doi:10.1119/1.12464

Cited by 14 publications

(8 citation statements)

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“…which is backwards in time (see example below). A similar result is obtained using the "parallax distance" [61], since both cases involve one-way propagation of light.…”

Section: Twin Paradoxsupporting

confidence: 70%

Vibrating Rays Theory

Bilbao¹,

Bernal²,

Minotti³

2014

Preprint

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The present work is aimed to explain why we started to consider Vibrating Rays Theory (VRT) as a viable representation of nature, and to elaborate some of its consequences. We first note that we have kept the probably unsuitable term "vibrating rays" as homage to its insightful introducer: Michael Faraday. Certainly, the image of rays or "protrusions" emanating from an electric charge is not a very palatable one for a contemporary physicist. The term is used in this work only as a reference to a complex, and as yet not studied, possible means of interaction among particles. In 1846 Faraday [1] introduced the concept of vibrating rays, in which an atom is conceived as having rays that extend to infinity and move with it. According to this point of view, electromagnetic radiative phenomena correspond to vibration of these rays, which propagate at speed c relative to the rays (and the atom). Although a discussion on this subject might seem to be out-of-date, there are many reasons that justified this work. The first reason is based on the fact that the constancy of the speed of light, irrespective of the source movement, has not been demonstrated experimentally in a conclusive way. In fact, only ballistic emission theories (see, for example, Ritz theory [2]) can be discarded by the experimental results (for example, Brecher [3] or Alvager et al.[4] both compare their results against a ballistic theory). The second reason is based on the fact that study of radiometric data from spacecrafts indicates the existence of different kinds of anomalous Doppler residuals. In 1998 Anderson et al. [5] reported an anomalous acceleration towards the Sun obtained from the analysis of the Doppler data of the Pioneer 10/11 spacecraft. The anomaly was inferred from a small, blueshift Doppler residual obtained as the difference between measured and modeled values. Besides this term (that may be a thermal effect) there is an annual term, and in a much shorter time scale, there is a diurnal term. Also, for the Pioneer 11 there was a fast increase in the anomaly right at Saturn encounter. More recently the Doppler frequency data of different spacecrafts before and after the closest approach to Earth have shown an unexpected frequency shift, which had been called flyby anomaly [6]. Further, a range disagreement has been measured between active and passive reflection [7]. We will show that the above mentioned anomalies exhibit a signature of VRT. The third reason is related to the time definition in a rotating frame. According to Special Relativity (SRT) there is not a unique way to assign a time, whereas under VRT no contradictions are present. And finally, that VRT is compatible with all known experiments on electromagnetism and light propagation. In the present work we will (1) explain how VRT should be interpreted, and why past experiments were misinterpreted (for example, by the use of the motion of a mirror image as if it were a real source, when according to SRT itself both produce different results), (2) show the characteristics ...

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“…which is backwards in time (see example below). A similar result is obtained using the "parallax distance" [61], since both cases involve one-way propagation of light.…”

Section: Twin Paradoxsupporting

confidence: 70%

Vibrating Rays Theory

Bilbao¹,

Bernal²,

Minotti³

2014

Preprint

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“…These aspects of the twin paradox are treated in the standard texts [1,2,3,4] . However, the description of 'when events happened' according to the travelling twin (Barbara say) seems never to have been fully settled [5,6] . In textbook treatments, Barbara's hypersurfaces of simultaneity, which define 'when events happened' according to her, have consistently been misrepresented or ignored.…”

Section: Introductionmentioning

confidence: 99%

On radar time and the twin “paradox”

Dolby¹,

Gull²

2001

American Journal of Physics

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In this paper we apply the concept of radar time (popularised by Bondi in his work on k-calculus) to the well-known relativistic twin 'paradox'. Radar time is used to define hypersurfaces of simultaneity for a class of travelling twins, from the 'Immediate Turn-around' case, through the 'Gradual Turnaround' case, to the 'Uniformly Accelerating' case. We show that this definition of simultaneity is independent of choice of coordinates, and assigns a unique time to any event (with which the travelling twin can send and receive signals), resolving some common misconceptions.

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“…-Though the inertial observers spacetimes are Minkowskian and isomorphic, they are different physical spaces attached each to a given 4-velocity vector u, at a given point p (1,17) .…”

Section: B and A Few Geometrical Toolsmentioning

confidence: 99%

Twin Paradox and Causality

Grandou,

Rubin

2007

Preprint

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Parallax distance, time, and the twin ’’paradox’’

Cited by 14 publications

References 0 publications

Vibrating Rays Theory

Vibrating Rays Theory

On radar time and the twin “paradox”

Twin Paradox and Causality

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