Continuous attempts to reconcile these latent mistakes have made STR increasingly tricky. The passage from the principle of relativity and the constancy of the speed of light to the basic equations of the STR is affected by four fundamental errors-three physical and one mathematical. I consider its two postulates to be very true, whereas the mathematics of the STR has a shortcoming, and, as for the experiments, the question must be posed: which theory do they support best? The problem for STR lies in the transition from its postulates to its basic equations, i.e., Lorentz transformation and the velocity addition formula. Is the special theory of relativity (STR) a "simple" or "tricky" theory? They who think that it is a simple theory say (i) that its postulates are simple, that Nature is such, (ii) that the mathematics of STR is perfect, and (iii) that experiments support it. Pourquoi pas, alors, la physique moderne manque-t-elle de exprimer 'l'Effet Doppler temporel' (c'est-a-dire l'Effet Doppler exprim e ' a travers les temps')? La relation entre la fr equence et le temps est egalement très bien connue. Nous savons aussi que, bas e sur le rapport de fr equence avec la longueur d'onde, energie et p eriode-nous pouvons exprimer l'effet Doppler a travers ces grandeurs physiques. Resume: Nous savons que l'Effet Doppler est la diff erence entre la fr equence a laquelle les signaux (ou particules) quittent une source et celle a laquelle ils atteignent un observateur, ph enomène caus e par un mouvement relatif. Then, why modern physics fails to express the "time DE," i.e., the DE through time)? But, it is also very well-known relationship between frequency and time. We also know that, based on the relationship of the frequency with wavelength, energy, and period, one can express the DE through these quantities. We know that the Doppler effect (DE) is the difference between the frequency at which signals (or particles) leave a source and that at which they reach an observer, caused by relative motion. Received: JanuAccepted: SeptemPublished Online: October 5, 2016 Key words: Doppler Effect Longitudinal Doppler Effect Transverse Doppler Effect. Enfin, l’effet Doppler longitudinal et l’effet Doppler transverse peuvent être obtenus relativement naturellement à partir de cette formule. Cet article utilise des calculs précis (sans postulats, hypothèses supplémentaires ni approximations) pour déduire une formule générale pour l’effet Doppler à un angle arbitraire entre la direction du mouvement de la source et la direction dans laquelle l’observateur reçoit le signal. Cependant, le cosinus de l’angle et le facteur de Lorentz ont été insérés de manière arbitraire dans cette équation. Outre les travaux de Voigt (1887) qui en présentent une explication incomplète, la première équation permettant de déduire l’effet Doppler transverse a été publiée dans les travaux d’Einstein (1905). La théorie de la relativité restreinte tire une fierté particulière de l’effet Doppler transverse (EDT). Finally, the longitudinal Doppler effect and TDE can be obtained quite naturally from this formula. This paper will, through calculation and with precision (without postulates, without additional assumptions, and without approximation), derive a general formula for the Doppler effect at an arbitrary angle between the direction of motion of the source and the direction in which the observer receives the signal. However, in this equation, the cosine of the angle and Lorentz factor are inserted arbitrarily. Apart from Voigt’s (1887) work which has an incomplete explanation, the equation from which the TDE is derived is first seen in Einstein’s (1905) work. The special theory of relativity takes particular pride in the transverse Doppler effect (TDE).
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