Einstein did not "prove" his postulates in the sense that he conducted tests to determine whether or not they fit experimental evidence. Instead, he wrote these postulates in his special theory of relativity while working as a patents clerk in Geneva in 1905 followed by the general theory in Germany in 1912.
Both theories have been tested extensively over the decades, and no variance from either theory has ever been found. Indeed, GPS systems would not work if relativistic corrections were not added to their calculations. Thus, relativity is as established a part of our understanding of our Universe as is gravity.
No but others have.
He asked God.
You tell me.
Einstein didn't prove the theory of relativity. It is a theory, a possible explanation, it is generally accepted because it explains a lot of things but that doesn't "prove" the theory, at least not to physicists. See related questions for the country of discovery.
The Einstein Theory of Relativity was developed by Albert Einstein in 1905. This theory introduced the concepts of special relativity and general relativity, revolutionizing our understanding of space, time, and gravity.
Albert Einstein developed the theory of relativity.
In 1916
Special Relativity 1905 General Relativity completed 1915 published 1916
The Theory of Relativity was developed by Albert Einstein.
Albert Einstein developed the general theory of relativity and the special theory of relativity in the early 20th century. These groundbreaking theories revolutionized our understanding of gravity, space, and time.
Albert Einstein developed the theory of relativity while working as a patent clerk in Bern, Switzerland in 1905. He published his theory in a paper titled "On the Electrodynamics of Moving Bodies." This groundbreaking work revolutionized our understanding of space, time, and gravity.
The theory of relativity was first proposed by Albert Einstein in 1905, with his publication of the special theory of relativity. Later, in 1915, Einstein further developed his theory with the publication of the general theory of relativity.