Greetings back with you this navigator @newton666, for this day contributed them more contained departing from the relativity of the concept of spatial distance with regard to the theorem of speed addition, where more information contributes us in field of the science in the physics.

The scientific fundamental reasoning of the theory of the relativity, it was a type of counterfoil in, this field of the science where the laws of the science should be the same, for whom they were focusing in free movement, independently of which it was his speed, also they were forming in the classic mechanics for Newton's laws, from this starting point we have, the simplicity of the equivalence between mass and energy summed up in the equation of Einstein E=mc2, where E is the energy, m, the mass and c, the speed of the light, more thoroughly managed to document that the speed of the light in the gap, has a universal constant with the value 299 792 458 m/s or 186 282,397 millas/s, with the time one managed to establish units as the definition of the light year, unit of length equivalent to 9,46 · 1015 m, since the speed of the light also can express to itself as 9,46 · 1015 m / year, the singularity of the rapidity across a way in the one that is alluded of the gap, this one goes to be subject to his electrical permitividad, and also at the same time of his magnetic permeability, to the moment that we mention the use of other means, it is necessary to think that the speed behaves in a low way to c, in order to manage to obtain a decoding of the index of refraction, that is since the electromagnetic radiation where the visible this light is included can propagate with constant rapidity in the gap. In if reading partners it is what it is a question of explaining of saying; as soon as major is the speed of the most difficult object it will be to increase his speed, giving it as a phenomenon in which the objects that move at speeds near to that of the light, of such a way it is observed that his mass increases more and more rapidly, what this needs more energy to accelerate the object a little more to the initial thing.

Theorem of speed addition

This formula has big implications, since on already having added relative speeds we cannot do it to the classic way, but we do not have any more remedy that to use this Formula and the sum of two speeds will always be a minor that the sum without never going on from the speed of the light.

! For many relative speeds that we never add we will happen of c ¡, there are considered to be a test to this theorem the results of the experience of Fizeau with regard to measuring the speed of the light in water in movement.

Information consulted in Relativity and Universe: Basic relativity and cosmology - Ángel Torregrosa Lillo, 2011.

In such a way that the general relativity predicts that the light should be turned away for the gravitational fields, grace that v and w are speeds in which the addition was realized, as a system of reference of movement, giving like turned out at a resultant observed speed that would be W, they know for that for following the speed of the light is not a speed limit in the conventional sense, since at speeds near to that of the light, already one has documented experimental results, where it is clear that this rule in this theorem, it is not possible to apply for the temporary dilation. It is remembered that at first I commented on them on the end of managing to obtain a decoding of the index of refraction, inside in a wave of electromagnetic radiation inside the scheme where it includes the visible light, where this one can propagate with constant rapidity in the gap, it is important to know on the index of index of refraction, as the quotient of the speed of the light in the gap and the speed of the light in the way.

A representation of refraction of the light in the interface between two ways with different indexes of refraction (n2> n1). As the phase speed is minor in the second way (v2 <v1), the angle of refraction θ2 is minor that the angle of incidence θ1; this is, the beam in the biggest way of index is near to the normal vector.

A representation straight ahead of wave of a punctual source in the context of the law of Snel, where the region under the gray line has an index of major refraction and speed of proportionally minor wave, that the region over the line, we have that the speed of the light in the gap c, as way of reference to any matter, so that it is effective the constant of spread has a way, which propagates for a wave guide it is the effective index for the number of wave of the gap.

In case of The Air.

Experiment of Fizeau

Information consulted in Relativity and Universe: Basic relativity and cosmology - Ángel Torregrosa Lillo, 2011.

A beam of light is reflected by a divisor of bundle of initial point and it is cofiled in a parallel bundle by the lens of the observer, the scope with this experiment reading partners was of detecting if really if an ether existed, but studying with the phenomenon of movement exercised on the water, the behavior of the light in this way, since the speed of the light would have to increase when it was displaced by the water along the pipe, in order to diminish when this one was that to manage to penetrate the resistance of the water. The addition of the resultant speed, where the wave of light would have to be added from his speed in the way of the matter of the water with the speed of the water as matter of the way and apart from achieving the phenomenon that across the pipes, both beams join again, to be able to see the speed that this one they cover is in this experiment.

Conclude with the following thing in the field of the physics this experiment it gave like turned out in the case that of the ether, this result coincides with this postulate, in the partial way of dragging the speed of the light along the pipe, at the same time the speed of movement of the water as way for the addition, to the initial moment almost equal of rest, of way in speeds it goes down the water in circulation. On the other hand also I depart from the classic philosophy of Einstein, where it alludes that any speed in which given by a body, this one can survive, without affecting his acceleration, since the movement of a body that falls down for a slope hastens, because the movement up is slowed down, but we go the case that happens in the gap, and that is uniform cannot diminish, it will depend that I it affected other factors, like field magnetic and gravitational fields.

[1] - relativity and Universe: Basic relativity and cosmology - Ángel Torregrosa Lillo, 2011.

[2] - the Physics - Adventure of the thought Albert Einstein – 2016.

[3] - essentials of optics, Bruno Rossi – 1966.

[4] - before Einstein: Relativity, light and gravitation Jean Eisenstaedt – 2015.

[5] - fundamental elements. Classic mechanics and thermodynamics. Special relativity. The Ist, Volume 1 for Mario Guerra, 1984.