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Sir Isaac Newton's theory of gravity was written in 1687, however he did not come up with a theory of relativity. The first person to come up with a theory of relativity was Galileo Galilei, but this theory turned out to be incorrect. In a paper in 1905 Albert Einstein built upon Galileo's ideas and produced the special theory of relativity. This is a very famous paper that turned the physics world on its head. The equivalance of mass and energy in his most famous equation, was deduced as a result of this theory. Furthermore, In 1916 Albert Einstein produced the General theory of relativity, a theory of gravitiation which is an extremely successfulvand famous theory. This is the gravitation theory that we use today, as it is supremely accurate. However, Newtons theory of gravitiation works well for speeds much less than the speed of light in a vacuum, and has the benefit of being much less complex!
Depends what you mean by "completed." Both special and general relativity are "complete" in that they fully describe that part of the Universe that they INTEND to describe. However, neither describes EVERYTHING. General relativity, for example, is a more complete theory than is special relativity. However, even GR is useful only for gravity, saying nothing about electro-magnetism (EM) in our Universe. Einstein was fully cognizant of this fact, and figured it would take a decade or so AT MOST to add EM to a fuller theory of relativity. Unfortunately, he was wrong -- not only is EM no closer to being combined with GR today than it was in 1915, but we now know that there are other forces we need to integrate into a more general theory! And even WORSE, we now know about quantum mechanics, which is mathematically IMPOSSIBLE to combine with GR. The final "completion" of relativity -- an combination of all forces with GR and QM -- still awaits us. If any person is able to devise a "Theory of Everything," s/he would go down in history in the same vein as Einstein or Newton.
Then we would not be here in theoretical physics today.
Probably the most well-known is E=mc2. Another one is his theory of relativity.
Yes ,we do still use the theory of relativity as it deals with the relativity of motion and rest. And, it is of great importance for the micro-world like sub-atomic phenomena of nuclear interactions. So the theory of relativity will be always useful.
rs today uses General Administrative Theory
If Albert Einstein didn't exist, then all of the stuff he discovered would be discovered later on and Albert Einstein's theory of relativity wouldn't exist until someone else states it later on. However, according to the QI Book of General Ignorance, Galileo Gallilei was the first to state the theory of relativity, so it would actually exist in today's world.
Albert Einstein has aided society by his discovery of the theory of relativity, space, time, energy and gravity.
While only peripherally connected to nuclear energy and atomic weapons, Einstein most famously proposed the theories of general and special relativity, which have applications in quantum theory, cryogenic research, and space exploration.
Albert Einstein changed the world we live in today by his experiments and discoveries. He developed the theory of relativity and many other physics of the world today.
Special relativity is a fundamental pillar in our understanding of the Universe. Many things are based on it, like the GPS system and nuclear power. Indirectly much of nano technology is based on special relativity so things like iPads, computers, modern cars, all have ingredients which can be traced back to the theory of special relativity.
Albert Einstein was a famous physicist. He discovered the formula e=mc-squared, which explained how energy works better than the formulas physicists had used previously. This is called the general theory of relativity, and is still used by physicists today. He also worked with gravitational fields, statistical mechanics, quantum theory and particle theory.