The universe of Einstein
Physics in the 19th
|Automatic translation||Updated June 01, 2013|
Physics has made in the 19th century progress and striking the community of physicists from the beginning of the 20th century, in a heated debate on the fundamental laws of the Universe.
Suddenly he unifies heaven and Earth into a single theory he called 'gravity'.
Image: Thanks to the seriousness that the sun has captured 99.86% of the total mass of dust and gas of the primordial nebula. Jupiter, the largest planet in the system, has captured 71% of the remaining mass. Other planets have shared the residue of the gravitational evolution, i.e. 0.038% of the total mass.
The universe of Einstein
With Newton there was a problem, if its laws describe the force of gravity with great precision, yet Newton hides an embarrassing secret, he has no idea how gravity works.
Immediately you would feel the effect of destroying the sun, but Einstein saw a huge problem in the theory of Newton. He knew that the light is propagated not instantaneously, it takes sunlight 8 minutes to travel 150 million miles that separates the Earth. But he has demonstrated that nothing, not even gravity can not travel faster than light, how the Earth would leave its orbit before the darkness resulting from the disappearance of the sun is reaching our eyes?
Image: Newton's theory predicts that if destruction of the sun, the planets would rush out of their orbits to drift into space. Newton envisioned gravity as a force acting instantaneously at any distance.
Tissue deformed by space-time
Einstein finally consider 3 dimensions of space and the single dimension of time, as related in the same tissue of Spacetime. He hoped that this understanding of the geometry of this four-dimensional tissue of space-time would allow him to speak simply of objects moving along the surface of this Spacetime. As the surface of a trampoline, the tissue is united distended and distorted by heavy objects such as planets and stars and this distortion or curvature of Spacetime, which creates what it feels like gravity. A planet like Earth is now in orbit not because the Sun will check and instantly seizes as in Newton's theory, but simply because it follows the curves of the tissue space curve caused by the presence of sun. With this new understanding of gravity we know now that if the sun disappears, as in our cosmic catastrophe, the gravitational disturbance that results, will form a wave that propagates through the tissue space in the same way that ripples in the surface of the water when you throw a pebble into a pond. We therefore feel no change in our orbit around the sun until the wave reaches the Earth. Also Einstein calculated that gravity waves travel at exactly the speed of light. So with this new approach, Einstein resolved the conflict with Newton to know how fast gravity propagates.
Einstein will give the world a new image of what is really the force of gravity. These curves and distortions in the fabric of space and time. He calls this new picture of gravity, general relativity. Despite his extraordinary success the physicist is not yet satisfied and he immediately sets another goal even higher, the unification of gravity with the only other known force at the time electromagnetism. The unified electromagnetism had had a few decades ago by Scotsman James Clark Maxwell 4 through mathematical equations.
Image: With its new approach, Einstein resolved the conflict with Newton to know how fast gravity propagates. Einstein will give the world a new image of what is really the force of gravity. Article inspired by the film of David Hickman "Einstein did not know yet."