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Inconsistency of the Special Relativity with the Principle of Relativity


Kassir, Radwan M.


Research Papers


Relativity Theory



Date Published:

December 12, 2013




Special Relativity, Relativity Principle, Length Contraction, Physics Laws, Relative Motion


The fact that the length of an object, relative to its rest frame, is independent of the object’s spatial orientation always holds and cannot be violated or demonstrated to be otherwise by any experimental or analytical means. Therefore, this fact becomes a principle that, by definition, can be brought to the level of a physics law. However, according to the Special Relativity (SR) this law is not applicable in an inertial reference frame in relative motion with respect to the object, thus violating the principle of relativity, the SR first postulate that states: “The laws of physics are the same in all inertial frames of reference”. This violation leads to many contradictions between the SR and its first postulate. Indeed, simple thought experiments in different areas of physics are examined showing how the SR predictions result in outcomes inconsistent with the principle of relativity. Relatively moving apparatuses physical measurements such as pressure vessel discharge time, optical lens focal length, and electrical resistance are shown―according to SR―to vary with the respective apparatus orientation in the space relative to the stationary reference frame. This is merely a violation of the relativity principle, since these measurements, in line with the applicable physics laws they’re subjected to, are independent of the apparatuses orientation with respect to the reference frames they travel with (i.e. with respect to their rest frames).


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