volume 6 issue 9 by Chandru Iyer
We present a common understanding of clock synchronization as opposed to the synchronization
conv... more We present a common understanding of clock synchronization as opposed to the synchronization
convention adopted by SRT in the context of the Twin Paradox; we place two spatially separated
observers in the stationary and travelling frames and discuss the synchronization issues at the
completion of the travels.
Papers by Chandru Iyer
Zenodo (CERN European Organization for Nuclear Research), Sep 30, 2018
We present a common understanding of clock synchronization as opposed to the synchronization conv... more We present a common understanding of clock synchronization as opposed to the synchronization convention adopted by SRT in the context of the Twin Paradox; we place two spatially separated observers in the stationary and travelling frames and discuss the synchronization issues at the completion of the travels.
Physics Essays, Jun 12, 2023
The importance of synchronization of spatially separated clocks in observing event coordinates ca... more The importance of synchronization of spatially separated clocks in observing event coordinates cannot be overemphasized. We illustrate this with a real-world example. The results show the dependence of both length contraction and time dilation on the adopted synchronization convention. It is illustrated that a change in synchronization convention completely alters the appearance of the physical world. This is to be viewed in the context of the stated position in physics that synchronization of spatially separated clocks in any inertial frame depended on the adoption of a convention for its resolution. The preferred method of synchronization of spatially separated clocks is the standard convention recommended by the theory of relativity; however, it still remains a convention.
arXiv (Cornell University), Oct 8, 2007
It is well known that simultaneity within an inertial frame is defined in relativity theory by a ... more It is well known that simultaneity within an inertial frame is defined in relativity theory by a convention or definition. This definition leads to different simultaneities across inertial frames and the well-known principle of relativity of simultaneity. The lack of a universal present implies the existence of past, present and future as a collection of events on a four dimensional manifold or continuum wherein three dimensions are space like and one dimension is time like. However, such a continuum precludes the possibility of evolution of future from the present as all events exist 'forever' so to speak on the continuum with the tenses past, present and future merely being perceptions of different inertial frames. Such a far-reaching ontological concept, created by a mere convention, is yet to gain full acceptance. In this paper, we present arguments in favour of an absolute present, which means simultaneous events are simultaneous in all inertial frames, and subscribe to evolution of future from the present.
The importance of synchronisation of spatially separated clocks in observing event coordinates ca... more The importance of synchronisation of spatially separated clocks in observing event coordinates cannot be overemphasized. We illustrate this with a real-world example. The results show the dependence of both length contraction and time dilation on the adopted synchronization convention. It is illustrated that a change in synchronization convention completely alters the appearance of the physical world. This is to be viewed in the context of the stated position in physics that synchronization of spatially separated clocks in any inertial frame depended on the adoption of a convention for its resolution. The synchronization of spatially separated clocks cannot be achieved by any means other than by a standard convention recommended by the theory of relativity; however it still remains a convention.
arXiv: General Physics, May 20, 2008
In a recent article [1] we have explored alternative decompositions of the Lorentz transformation... more In a recent article [1] we have explored alternative decompositions of the Lorentz transformation by adopting the synchronization convention of the target frame at the end and alternately at the outset. In this note we develop the decomposition by assuming a correct universal synchronization that may be outside the two inertial frames that are involved.
The importance of synchronisation of spatially separated clocks in observing event coordinates ca... more The importance of synchronisation of spatially separated clocks in observing event coordinates cannot be overemphasized. We illustrate this with a real-world example. The results show the dependence of both length contraction and time dilation on the adopted synchronization convention. It is illustrated that a change in synchronization convention completely alters the appearance of the physical world. This is to be viewed in the context of the stated position in physics that synchronization of spatially separated clocks in any inertial frame depended on the adoption of a convention for its resolution. The synchronization of spatially separated clocks cannot be achieved by any means other than by a standard convention recommended by the theory of relativity; however it still remains a convention.
A short comment regarding the derivation of Lorentz transformation proposed by Iyer and Prabhu (2... more A short comment regarding the derivation of Lorentz transformation proposed by Iyer and Prabhu (2007 Eur. J. Phys. 11 183-90) is given. It is shown that the proposed derivation is similar to that appearing in the standard textbooks of classical mechanics, electrodynamics and the theory of relativity. In fact, those textbooks also provide an elegant form of the Lorentz matrix for the (3+1)-dimensional case, which Iyer and Prabhu claim to be difficult to attain because of its algebraic complexity. We also provide the derivation of the (3+1)-dimensional version of the Lorentz matrix using a method analogous to that proposed by Iyer and Prabhu, and show that the result is completely equivalent to the (3+1)-dimensional version appearing in the textbooks.
Arxiv preprint arXiv:0809.1740, 2008
Abstract: In the usual rod and slot paradox, the rod, if it falls, was expected to fall into the ... more Abstract: In the usual rod and slot paradox, the rod, if it falls, was expected to fall into the slot due to gravity. Many thought experiments have been conducted where the presence of gravity is eliminated with the rod and slot approaching each other along a line joining their ...
In the rod and hole paradox as described by Rindler (1961 Am. J. Phys. 29 365-6), a rigid rod mov... more In the rod and hole paradox as described by Rindler (1961 Am. J. Phys. 29 365-6), a rigid rod moves at high speed over a table towards a hole of the same size. Observations from the inertial frames of the rod and slot are widely different. Rindler explains these differences by the concept of differing perceptions in rigidity. Gron and Johannesen (1993 Eur. J. Phys. 14 97-100) confirmed this aspect by computer simulation where the shapes of the rods are different as observed from the co-moving frames of the rod and slot. Lintel and Gruber (2005 Eur. J. Phys. 26 19-23) presented an approach based on retardation due to speed of stress propagation. In this paper we consider the situation when two parallel rods collide while approaching each other along a line at an inclination with their axis. The collisions of the top and bottom ends are reversed in time order as observed from the two co-moving frames. This result is explained by the concept of extended present derived from the princip...
arXiv: General Physics, 2013
The second postulate of special relativity, namely, the equivalence of inertial frames, implies t... more The second postulate of special relativity, namely, the equivalence of inertial frames, implies that all clocks must run identically across inertial frames. Under this principle, global clock synchronization may be feasible if an appropriate procedure can be developed. It is well-known that synchronization within an inertial frame using the methods of light rays or slow separation of clocks results in synchronization that is specific to that inertial frame. This paper describes a new procedure to synchronize clocks co-moving with different inertial frames, and analyzes its effectiveness.
In determining the classical Doppler Effect, two assumptions are used for computing the differenc... more In determining the classical Doppler Effect, two assumptions are used for computing the difference in distance travelled by consecutive signals: (a) the receptor is stationary, and (b) the emitter is stationary. The calculated Doppler Effect under the two assumptions are identical, provided the velocity of propagation with respect to source and the velocity of propagation with respect to the receptor differ exactly by the velocity of relative motion. We show that, in the case of light, the ratio of the two calculated classical Doppler Effects, with propagation speed c in the source and receptor inertial frames respectively, remains constant in all geometries and orientations. Furthermore, the observed Doppler Effect, as predicted by special relativity, is the geometric mean of the two expected classical Doppler Effects in all geometries and orientations. This leads to two simultaneous conclusions: (1) by the receptor that the clock associated with the emitter runs slow, and (2) by the emitter that the clock associated with the receptor runs slow. These differences can be resolved if we theorize that light travels at speed c with respect to the emitter as it leaves the emitter and travels at speed c with respect to the receptor as it approaches the receptor.
The clock paradox is analyzed for the case when the onward and return trips cover the same > (... more The clock paradox is analyzed for the case when the onward and return trips cover the same > (as observed by the traveling twin) but at unequal velocities. In this case the stationary twin observes the distances covered by her sister during the onward and return trips to be different. The analysis is presented using formulations of special relativity and the only requirement for consistency is that all observations are made from any one chosen inertial frame. The analysis suggests that a defining feature of an inertial frame should be based on the continued maintenance of the distinctive synchronicity of the clocks co-moving with it. Published in Journal of Physical and Natural Sciences Volume 1, Issue 1, 2007 this http URL
We have compared the data of three clocks A, B and D moving in relative uniform motion with relat... more We have compared the data of three clocks A, B and D moving in relative uniform motion with relative speed/velocity between A and B set at 0.6c, relative speed/velocity between A and D set at 0.8c and relative speed between B and D set at (5c/13) = 0.3846c as per the velocity addition formula (0.8-0.6)/(1-0.8*0.6). We have compared the time readings of the clocks when they meet at three events. Event 1 meeting of A and B, Event 2 meeting of A and D, Event 3 meeting of B and D.
In a recent article [1] we have explored alternative decompositions of the Lorentz transformation... more In a recent article [1] we have explored alternative decompositions of the Lorentz transformation by adopting the synchronization convention of the target frame at the end and alternately at the outset. In this note we develop the decomposition by assuming a correct universal synchronization that may be outside the two inertial frames that are involved.
International Journal of Research -GRANTHAALAYAH
convention adopted by SRT in the context of the Twin Paradox; we place two spatially separated ob... more convention adopted by SRT in the context of the Twin Paradox; we place two spatially separated observers in the stationary and travelling frames and discuss the synchronization issues at the completion of the travels.
Journal of Physics Communications
Both Lorentz and Tangherlini transformations transform length identically, but transform time dif... more Both Lorentz and Tangherlini transformations transform length identically, but transform time differently leading to different synchronization. Measured length of a moving rod is expected to be different when adopting different synchronizations as the distance between the two ends of the moving rod has to be measured at the same instant to determine the length of the moving rod. Thus, a difference in measured length of a moving rod would only imply that two different synchronizations were involved and may not be construed as conclusive evidence in favor of PFT or SRT.
In determining the classical Doppler Effect, two assumptions are used for computing the differenc... more In determining the classical Doppler Effect, two assumptions are used for computing the difference in distance travelled by consecutive signals: (a) the receptor is stationary, and (b) the emitter is stationary. The calculated Doppler Effect under the two assumptions are identical, provided the velocity of propagation with respect to source and the velocity of propagation with respect to the receptor differ exactly by the velocity of relative motion. We show that, in the case of light, the ratio of the two calculated classical Doppler Effects, with propagation speed c in the source and receptor inertial frames respectively, remains constant in all geometries and orientations. Furthermore, the observed Doppler Effect, as predicted by special relativity, is the geometric mean of the two expected classical Doppler Effects in all geometries and orientations. This leads to two simultaneous conclusions: (1) by the receptor that the clock associated with the emitter runs slow, and (2) by the emitter that the clock associated with the receptor runs slow. These differences can be resolved if we theorize that light travels at speed c with respect to the emitter as it leaves the emitter and travels at speed c with respect to the receptor as it approaches the receptor.
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volume 6 issue 9 by Chandru Iyer
convention adopted by SRT in the context of the Twin Paradox; we place two spatially separated
observers in the stationary and travelling frames and discuss the synchronization issues at the
completion of the travels.
Papers by Chandru Iyer
convention adopted by SRT in the context of the Twin Paradox; we place two spatially separated
observers in the stationary and travelling frames and discuss the synchronization issues at the
completion of the travels.