The interface has always been defined by law materializing objectively interpret the world, beyond the subjectivity of the viewer, to suggest a formula that enables the reading of the world regardless of the conditions in which the world is perceived. The theory of relativity that will clearly articulated:
"By studying the heavens we are deprived of all senses except sight. We can not touch the sun, or travel to it. [...] However, astronomers have consistently applied their geometry and physics who believed valid for the surface of the earth and based on touch and on the road. " Therefore, the absolute motion would be a fiction, and thus born the calculation.
"As advanced physics is clearer than the view, as a source of basic knowledge on the subject, is less misleading than the touch."
"Physics aims to inform about what occurs in the physical world, not just on private perceptions of each of the observers. Physics therefore has an interest in those aspects of a physical process presents to all observers. Such issues can only be regarded as belonging to the same physical fact. This requires that the "laws" of phenomena have to be the same, whether they are described as they appear to an observer or in another court. The only principle is the reason generator whole theory of relativity ".
" Each one is equally justified and errs if it gives an objective validity to subjective measures. This distance in space between two events is, therefore, a physical fact itself. But there is a physical fact can be deduced from the distance in time along with the distance in space. This is what is called the "interval" in the space-time. [...] The interval between two events is a physical fact about them, not dependent on the particular circumstances of the observer. "
Cfr, Bertrand Russell, ABC relativity, Ariel, Barcelona , 1989 (London, 1958)
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