This article summarizes one of the topics covered in my book Prilog razumijevanju i kritici teorije relativnosti (Contributions To the Understanding and Criticism Of the Theory of Relativity), presenting an analysis of various interpretations of relativistic phenomena and of attempts to conceive an experiment that would make it possible to achieve supra-light velocity.
Many experiments have already been carried out which have shown that a wave or, generally speaking, an electromagnetic impulse, can in no way exceed c, i.e. the speed of light.
At this point it is very important to stress something usually overlooked in papers like this one: those same experiments have also shown that an electromagnetic impulse is quite unable to move at a velocity that is lower than the speed of light. Even if the source of the impulse moves at a velocity close to the speed of light, neither is the speed of the impulse increased if emitted in the direction the source itself is moving, nor reduced if emitted in the opposite direction; instead, the Doppler effect appears. This experience demonstrates in the most direct way that the speed of light c need not be regarded as a property of light itself, or of an electromagnetic impulse, but as the property of the medium which transfers them, i.e. as its TRANSFERENCE CONSTANT. If the speed of light c were a property of electromagnetic impulses or waves of light themselves, or photons, it would be impossible for the Doppler effect to take place. By TRANSFERENCE CONSTANT I understand the specific speed of transferring signals, information, impulses, waves, force, etc. No medium is capable of transferring electromagnetic impulses at a speed that is either lower or higher than c, since c is its TRANSFERENCE CONSTANT which could be changed only if other properties of the medium itself are changed beforehand. The above should, I believe, suffice to demonstrate why it cannot be expected that light waves, electromagnetic impulses, or information travel at a speed higher or lower than c. But what is the situation with mass particles? These are not carried by the medium; instead, they move through it and are fully independent of its TRANSFERENCE CONSTANT. Consequently, they should supposedly be capable of moving both slower and faster than the value of the TRANSFERENCE CONSTANT of medium. Effecting, observing and measuring motions at speeds below c offers no problem. However, as far as movement at speeds greater than c is concerned, experience has demonstrated that powerful electromagnetic impulses emitted by big accelerators are unable to accelerate mass particles even close to the speed of light, even if the electromagnetic waves used possess enormously high energy values.
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