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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. Special relativity applies to all physical phenomena in the absence of gravity.
Sep 14, 2010 · Scientists learned that light travels at a constant speed, even on a speeding train. Therefore, Einstein proposed the theory of special relativity, which boils down to this: The laws of physics are the same in all inertial frames, and the speed of light is the same for all observers.
General relativity generalizes special relativity and refines Newton's law of universal gravitation, providing a unified description of gravity as a geometric property of space and time or four-dimensional spacetime.
In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time. In Albert Einstein's 1905 treatment, the theory is presented as being based on just two postulates:
Relativity is two related theories: special relativity, which explains the relationship between space, time, mass, and energy; and general relativity, which describes how gravity fits into the mix. Albert Einstein proposed these theories starting in 1905.
The “theory of relativity” (or simply “relativity”) generally refers to two theories of Albert Einstein, his Special Theory of Relativity (or simply special relativity) of 1905, and his General Theory of Relativity (or general relativity) of 1916.
Apr 28, 2019 · In Summary: Special Relativity vs. General Relativity. Special relativity is a theory arguing that the relative motion of two objects should be the frame of reference rather than an external or esoteric reference system. On the other hand, the general relativity theory is a theory of space and time as the two aspects of spacetime, and a theory ...
Jul 31, 2024 · Relativity, wide-ranging physical theories formed by the German-born physicist Albert Einstein. Special relativity is limited to objects that are moving with respect to inertial frames of reference. General relativity is concerned with gravity, one of the fundamental forces in the universe.
Sep 12, 2022 · Relativity is the study of how observers in different reference frames measure the same event. Modern relativity is divided into two parts. Special relativity deals with observers in uniform (unaccelerated) motion, whereas general relativity includes accelerated relative motion and gravity.
It’s all relative. Einstein solved the mystery by slowly peeling away most of Newton’s assumptions. The first of these was that space and the passage of time are separate and set in stone. In his special relativity theory, Einstein instead showed that the laws of physics and, crucially, the speed of light are the things that are constant.
