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  1. The theory of relativity usually encompasses two interrelated physics theories by Albert Einstein: special relativity and general relativity, proposed and published in 1905 and 1915, respectively. [ 1 ] Special relativity applies to all physical phenomena in the absence of gravity. General relativity explains the law of gravitation and its ...

  2. Jul 31, 2024 · Special relativity revealed that the speed of light is a limit that can be approached but not reached by any material object; it is the origin of the most famous equation in science, E = mc2; and it has led to other tantalizing outcomes, such as the “ twin paradox.”. “General relativity” is concerned with gravity, one of the fundamental ...

  3. Jan 26, 2017 · The theory is based on two fundamental principles: Relativity: The laws of physics do not change. Even for objects moving at inertial, constant speed frames of reference. Speed of light: It is the ...

  4. General relativity is the geometric theory of gravitation published by Einstein in 1915 and the current description of gravity in modern physics. It predicts phenomena such as black holes, gravitational waves, and the expansion of the universe, and has been confirmed by numerous tests.

  5. May 14, 2023 · What is general relativity? General relativity is a physical theory about space and time and it has a beautiful mathematical description. According to general relativity, the spacetime is a 4 ...

  6. May 16, 2017 · September 1905: Mass and Energy. That first paper wasn’t the end of it, though. Einstein kept obsessing on relativity all through the summer of 1905, and in September he sent in a second paper ...

  7. Jul 26, 2024 · general relativity, part of the wide-ranging physical theory of relativity formed by the German-born physicist Albert Einstein. It was conceived by Einstein in 1916. General relativity is concerned with gravity, one of the fundamental forces in the universe. Gravity defines macroscopic behaviour, and so general relativity describes large-scale ...

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