Blog Ekkehard Friebe

By John H. Field

Beitrag aus dem GOM-Projekt: 2394 weitere kritische Veröffentlichungen
zur Ergänzung der Dokumentation Textversion 1.2 – 2004, Kapitel 4.

Space time measurements in special relativity / – [Schweiz]: WWW 1998. 33 S.
(University of Geneva preprint UGVA-DPNC 1998/04-176.)
URL: http://arxiv.org/pdf/physics/9902048v1

S. 1-2: „The purpose of this paper is to point out that the t = constant projection of the LFC and the x‘ = constant projection of TD are not the only physically distinct Space Time Measurements (STM) possible within Special Relativity. In fact, as will be demonstrated below, there are two others: Space Dilatation (SD), the t‘ = constant projection and Time Contraction (TC), the x = constant projection.“

S. 31: „Einstein’s great achievement in his first paper on Special Relativity [1] was, for the first time, to clearly disentangle in Classical Electromagnetism, the purely geometrical and kinematical effects embodied in the Lorentz Transformation from dynamics. In spite of this, papers still appear from time to time in the literature claiming that moving objects ‚really‘ contract [6] or that moving clocks ‚really‘ run slow [7] for dynamical reasons, or even that such dynamical effects are the true basis of Special Relativity and should be taught as such [8]. As it has been shown above that a moving object can apparently shrink or expand, and identical moving clocks can apparently run fast or slow, depending only on how they are observed, it is clear that they cannot ‚really‘ shrink, or run slow, respectively. If a moving object actually shrinks for dynamical reasons it is hard to see how the same object, viewed in a different way (in fact only illuminated dierently in its own rest frame) can be seen to expand. Certainly both effects cannot be dynamically explained. In fact the Lorentz Transformation, as applied to space-time, describes only the appearance of space-time events, a purely geometrical property. The apparent distortions are of geometrical origin, the space-time analogues of the apparent distortions of objects in space, described by the laws of perspective, when they are linearly projected into a two dimensional sub-space by a camera or the human eye.“

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