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Galileo Galile wrote "the Theory of Relativity", and Einstein wrote the General theory of relativity and the special theory of relativity.
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Some of them are 1) Big Bang Theory 2) Super string theory 3) General Relativity 4) Special Relativity 5) Quantum Theory
There are actually two theories of relativity, the special theory and the general theory. In the special theory (1905) Einstein showed the relationship between energy, motion and mass. In the General theory (1912) he showed the relationship between acceleration, Time and gravity.
A "hypothesis" changes to a "theory" when empirical evidence backs it up. Every experiment done over the last 90 years has supported general relativity; not one experiment has challenged it. Indeed, accurate GPS devices would not work unless the effects of general relativity were not factored into their clocks -- so, in effect, every GPS device in the world is an experiment that supports GR. Contrary to what some people, with a CLEAR and UNDENIABLE motivation to confuse people on what a "theory" means, wrongly claim that a scientific "theory" is something unproven. That is simply not true, but these people will continue to repeat this lie.
Galileo Galile wrote "the Theory of Relativity", and Einstein wrote the General theory of relativity and the special theory of relativity.
The simple answer is that Special Relativity can be described with simple algebraic processes. General Relativity involves much more complex mathematics, including tensor calculus, for its mathematical description.
Einstein...
The Theory of Special Relativity was published in 1905. General Relativity was published in 1915.
There's no such thing as an official theory. The classical theory of general relativity is the one that Einstein invented.
The General theory of relativity primarily applies to particles as they accelerate, particularly due to gravitation
Einstein's theory of relativity encompasses two theories: special relativity and general relativity. The theory of relativity is simply referred to as relativity in the field of physics.
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It was not invented, it is a property of nature that we all experience. However, the best description of it was proposed by Einstein in his General Theory of Relativity.
E=mc^2 Edit : That equation is part of "special relativity" not "general relativity".
At first people thought that General Relativity was a bizarre and irrelevant theory. However, as time went by, people started to accept General Relativity more and more.
Einstein