N. Kleiner's research while affiliated with University of Tuebingen and other places
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Publications (3)
How does a “standing” light wave that is perpendicular to the direction of motion of a receding observer, look to the observer? Both the relativistic Doppler effect and the relativistic conservation of lateral distances, implicit in the Lorentz transformation, are valid. Nevertheless, the size of all objects in the receding frame can be shown to be...
Can several simultaneities exist simultaneously, as Einstein proposed in 1905? The example of a circular return, introduced in the same paper, produces an "aging paradox." The latter is a special case to the more general "paradox of clock synchronization" on the rotating disk, as Pellegrini and Swift called it, or synonymously "synchronization gap,...
A new experiment, "Gravity Point", is proposed: The momentary direction of the pull of gravity on the surface of the earth can be probed. The time-dependent changes of the gravitational potential are either instantaneous in accord with Newton, or follow the change of the moon's position belatedly in accord with Einstein. A pendulum-based design is...
Citations
... De même, s'il va plus vite que la course du soleil, il arrive avant d'être parti ! 12 Mais il n'y a rien de bizarre concrètement. Des questions analogues à celles développées ici se retrouvent dans la discussion de la synchronisation des horloges sur des disques (apparition de « multi-simultanéités », voir par exemple les travaux de Rössler et al., 2002, discutés dans Guy, 2004). ...
... In In recent years some authors have studied the properties of superluminal signals and particles faster than the speed of light (tachyons) both in classical physics and in quantum gravity [9][10][11][12]. In particular, Magueijo [9] considered a new special relativity consistent with unification of all forces and found that at the quantum gravity border of unification (at the Planck length and time) the speed of light becomes infinite. ...