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# How to read Einsteins theory of relativity? | Physics

## How to read Einsteins theory of relativity? Albert Einstein

Albert Einstein - Ulm, March 14, 1879. - Princeton, April 18th 1955th - it was a theoretical physicist, one of the greatest minds and the most important figures in the history of mankind. When the first theory of relativity first published, it is said that in the whole world can be understood only ten scientists! Obviously, then, that in this article, Einsteins theory of relativity can not even begin to explain in detail and detail. However, it is useful to have a general idea of ​​what this deal Einstein and what is the problem being solved. Everyone knows from experience that any movement of relative. This means that it can be measured only in relation to something else.
For example, sitting on the train and looking out the window. Looking the items which promote fast, you know youre on the move. But, you sit across from another man.
In relation to the man sitting across from you, you do not move! Because movement can mean something only when viewed in relation to something stationary. This is the first and fundamental part of Einsteins theory. We can formulate the following: the movement of our bodies a steady speed through space can not be determined solely by looking at the body.
second part of Einsteins theory says that the speed of light is the only absolute and unchanging size of the universe.
We know that light is approximately 3 million meters per second. But, it really is fantastic to be able to imagine it can not be changed. Here for the unusual, if is a car traveling at 100 kilometers per hour, this means that someone who measured the speed of the car is standing still in place and not moving. If the car passes by a second car, moving in the same direction at a speed of 40 kilometers per hour, then will pass that car at 60 miles an hour, but when another car, rather than moving the same direction, moving the opposite direction, cars would be passed each other at a speed of 140 kilometers per hour. If we, according to Einstein, the speed of light beams to measure the described above - for example, we run in one direction, and the light is moving in the opposite direction - there would be no difference: for light and air would still be moving at the speed of 300,000 kilometers per second. This is only a rough, general picture of which dealt with Einstein in his theory of relativity. Among other things, he dealt with the problem of mass and energy, and how mass and energy are transformed into each other.

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