Gravitational Field - General Relativity

General Relativity

In general relativity the gravitational field is determined by solving the Einstein field equations,

Here T is the stress–energy tensor, G is the Einstein tensor, and c is the speed of light,

These equations are dependent on the distribution of matter and energy in a region of space, unlike Newtonian gravity, which is dependent only on the distribution of matter. The fields themselves in general relativity represent the curvature of spacetime. General relativity states that being in a region of curved space is equivalent to accelerating up the gradient of the field. By Newton's second law, this will cause an object to experience a fictitious force if it is held still with respect to the field. This is why a person will feel himself pulled down by the force of gravity while standing still on the Earth's surface. In general the gravitational fields predicted by general relativity differ in their effects only slightly from those predicted by classical mechanics, but there are a number of easily verifiable differences, one of the most well known being the bending of light in such fields.

Read more about this topic:  Gravitational Field

Other articles related to "general relativity, relativity, general":

Stanley Deser
... physicist known for his contributions to general relativity ... In the context of general relativity, he is best known for his development (with Richard Arnowitt and Charles Misner) of the ADM formalism, roughly speaking a way ... globally quantities like energy or, equivalently, mass (so-called ADM mass/energy) which, in general relativity, is not trivial at all ...
General Relativity - Current Status
... General relativity has emerged as a highly successful model of gravitation and cosmology, which has so far passed many unambiguous observational and experimental tests ... Even taken as is, general relativity is rich with possibilities for further exploration ... More than ninety years after its publication, general relativity remains a highly active area of research ...
Special Relativity (alternative Formulations) - Curvilinear Coordinates and Non-inertial Frames
... This is "special relativity" as usually understood ... This is non-gravitational physics plus general covariance ... This is the sense in which "special relativity" can handle accelerated frames ...
Superstring Theory - Integrating General Relativity and Quantum Mechanics
... General relativity typically deals with situations involving large mass objects in fairly large regions of spacetime whereas quantum mechanics is ... with their congruence is that, at Planck scale (a fundamental small unit of length) lengths, general relativity predicts a smooth, flowing surface, while quantum mechanics predicts a random, warped surface ...
Antigravity - Hypothetical Solutions - General-relativistic "warp Drives"
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Famous quotes containing the words relativity and/or general:

    By an application of the theory of relativity to the taste of readers, to-day in Germany I am called a German man of science, and in England I am represented as a Swiss Jew. If I come to be regarded as a bête noire the descriptions will be reversed, and I shall become a Swiss Jew for the Germans and a German man of science for the English!
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    The general will is always right.
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