Alberto Chamorro Belmont, Professor of Theoretical Physics at the University of the Basque Country in Laredo explained that "today there is no theory that predicts that there was a beginning for universe, a big-bang, do not know if one day we will "
Alberto Chamorro Belmont, Professor of Theoretical Physics at the University of the Basque Country in Laredo explained the two theories of relativity of Einstein. He has done in the course of Cosmology directed by Francisco González de Posada, which has ensured that "today there is no theory that predicts that there was a beginning for the universe, a big-bang, do not know if we will someday."
"Very often the information is cast in the modern cosmological theory predicts that there was a beginning for the universe which is called big-bang but this is not true. Because we now know that modern cosmology when the equations are extrapolated to the past leads to the existence of a beginning for the universe, but when those are made by extrapolating the theory beyond its current range of validity, "he explained.
During his two interventions, the professor explained to those attending the first relativistic revolution, accounting and significance of special relativity, published in 1905 by Einstein. The second revolution relativity, general theory of relativity, which is due to the efforts of Einstein when at the end of 1915 published the fundamentals of this theory. He has also mentioned the implications for the description of the universe, ie, cosmology, was the general theory of relativity and physical-mathematical foundations of cosmology.
theory of special relativity
relativistic The first revolution involved the resolution of fundamental problems that light travels in a medium imponderable ether and was called to highlight the movement of the earth with respect to the ether. Einstein denied the existence of this medium.
Physics consisted of two separate domains that were the corpus of Newtonian mechanics and the body of the electromagnetic theory of Maxwell. These two bodies had been very successful, but as the fundamental equations of Newtonian mechanics were unchanged under the group called Galileo transformations, the fundamental equations of electromagnetic theory were not invariant under this group of transformations, but under another set of transformations called Lorentz.
"It was disturbing to physicists there were two separate domains of physics governed by different laws of symmetry, "said. As Newtonian mechanics had been so successful most physicists tried to modify Maxwell's electromagnetic theory to make it invariant. But Einstein had the audacity to consider that the electromagnetic theory was right and modify Newtonian mechanics "electromagnetizándola", modifying the equations to make them invariant under the symmetry group that made Maxwell's equations invariant. The set of coupled electromagnetic theory of Newtonian mechanics electromagnetizada is what constitutes the special theory of relativity.
"This first modern revolution had consequences as relativistic equivalence of mass and energy, a different concept of space and time, problems and phenomena of time dilation, etc.," he argued.
The theory of general relativity
In cosmology is the theory of general relativity which has major implications. The general theory of relativity was an extension of the special theory to encompass and to describe the phenomena within it and to describe gravitational physics also from the viewpoint of non-inertial systems.
fundamental force that dominates in the cosmos at large scale is the gravitational force. When the gravitational force could be described by a theory like general relativity theory, the application of this theory of the fundamental equations of Einstein gravity to the whole cosmos gives us together with some assumptions of symmetry, which are called the cosmological principle, which is to say that the universe is isotropic and homogeneous, "leads to solutions that are the foundation of modern cosmology." Implications
present two theories of relativity had some implications that we live in today. Both are at the core theory of GPS to determine the position of objects at a time. In the definition of meter as standard length. In all he has to do with nuclear fusion, and modern particle accelerators.
But besides all this, general relativity is mainly an implication, "has given us a scientific view of the universe that modern cosmology is that we can say that the universe 14,000 million years ago was very different the present, there were no galaxies, stars, or living things. Modern cosmology has been very successful because it has predicted things that have been observed after the expansion of the universe. "
Taken in elgallodigital.com
Noticiencias Taken in elgallodigital.com
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