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1. General Relativity - Wikipedia, The Free Encyclopedia
General relativity or the general theory of relativity is the geometric theory of gravitation published by Albert Einstein in 1915.
http://en.wikipedia.org/wiki/General_relativity
##### General relativity
Mathematical formulation

Resources
Fundamental concepts Special relativity
Equivalence principle

World line
Riemannian geometry Phenomena Kepler problem Lenses Waves
Frame-dragging
...
Black hole
Equations Linearized Gravity
Post-Newtonian formalism

Einstein field equations

Friedmann equations
...
BSSN formalism
Advanced theories Kaluza–Klein Quantum gravity Solutions Schwarzschild ... pp-wave Scientists Einstein Minkowski Eddington Lemaître ... e General relativity or the general theory of relativity is the geometric theory of gravitation published by Albert Einstein in 1915. It is the current description of gravitation in modern physics . It generalises special relativity and Newton's law of universal gravitation , providing a unified description of gravity as a geometric property of space and time , or spacetime . In particular, the

2. General Relativity - Simple English Wikipedia, The Free Encyclopedia
General relativity is a theory of space and time created by Albert Einstein
http://simple.wikipedia.org/wiki/General_relativity
##### General relativity
• The bending of light as it passes the Sun by twice the Newtonian value for an object traveling at the speed of light . This was confirmed by Eddington in , and the announcement forced scientists to take general relativity seriously. The perihelion of the planet Mercury advances more than is expected under Newtonian physics . General relativity accounts for the difference between what is seen and what is expected without it. The gravitational redshift effect , by which the wavelength of light increases as it moves away from a massive object. This was confirmed by the

3. GENERAL RELATIVITY
In order to understand General Relativity, we have to define how mass is defined . As you see, the principle of General Relativity is fully in accordance
http://www.gravitywarpdrive.com/General_Relativity.htm
 This is the English translation of a Web Page originally written in French , by Nymbus , who also provided the translation. I have posted it here at my own Website, with some minor personal additional comments. The content has been left untouched. Any comments or questions should be addressed to nymbus@wanadoo.fr Minor editing, the Space-Time Compression description, and the Conclusions were provided by Ken Wright. Reference: http://www.svsu.edu/~slaven/gr/ NOTE: The above reference link appears to be no longer active. Before beginning this brief article, dealing with the essential features of General Relativity, we have to postulate one thing: Special Relativity is supposed to be true. Hence, General Relativity lies on Special Relativity. If the latter were proved to be false, the whole edifice would collapse. In order to understand General Relativity, we have to define how mass is defined in classical mechanics. The Two Different Manifestations of Mass: Many experiments have been done to measure the inertial and gravitational mass of the same object. All lead to the same conclusion: The inertial mass equals the gravitational mass. Aiming at this, he stated his third postulate, known as the principle of equivalence. It says that if a frame is uniformly accelerated relative to a Galilean one, then we can consider it to be at rest by introducing the presence of uniform gravitational field

4. Introduction To General Relativity - Wikipedia, The Free Encyclopedia
General relativity (GR) is a theory of gravitation that was developed by Albert Einstein between 1907 and 1915. According to general relativity, the observed gravitational
http://en.wikipedia.org/wiki/Introduction_to_general_relativity
##### Introduction to general relativity
Mathematical formulation

Resources
Fundamental concepts Special relativity
Equivalence principle

World line
Riemannian geometry Phenomena Kepler problem Lenses Waves
Frame-dragging
...
Black hole
Equations Linearized Gravity
Post-Newtonian formalism

Einstein field equations

Friedmann equations
...
BSSN formalism
Advanced theories Kaluza–Klein Quantum gravity Solutions Schwarzschild ... pp-wave Scientists Einstein Minkowski Eddington Lemaître ... General relativity (GR) is a theory of gravitation that was developed by Albert Einstein between 1907 and 1915. According to general relativity, the observed gravitational attraction between

5. Category:General Relativity - Wikipedia, The Free Encyclopedia
General relativity is the best known relativistic classical field theory of
http://en.wikipedia.org/wiki/Category:General_relativity
##### Subcategories
This category has the following 12 subcategories, out of 12 total.
##### Pages in category "General relativity"
The following 93 pages are in this category, out of 93 total. This list may not reflect recent changes ( learn more
##### G cont.

6. General Relativity | Department Of Physics
Jan 11, 2009 Partial Differential Equations of Physics. R. Geroch. In General Relativity, Scottish Universities Summer School in Physics, 1996.
http://physics.uchicago.edu/research/areas/general_relativity.html
##### Department of Physics

7. General Relativity - Wikibooks, Collection Of Open-content Textbooks
General Relativity. From Wikibooks, the opencontent textbooks collection
http://en.wikipedia.org/wiki/Wikibooks:General_relativity
##### edit Index

8. General Relativity - CreationWiki, The Encyclopedia Of Creation Science
May 1, 2010 Einstein s theory of General Relativity is an extension of Special Relativity into the general case of noninertial frames, the result is a
http://creationwiki.org/General_relativity
##### From CreationWiki, the encyclopedia of creation science
Jump to: navigation search Two-dimensional visualisation of space-time distortion. The presence of matter bends spacetime, this bending being interpreted as gravity. Einstein's theory of General Relativity is an extension of Special Relativity into the general case of non-inertial frames, the result is a theory of gravity that extends and corrects Newtonian gravitation . According to General relativity, gravity results from a space-time distortion caused by the presence of a mass. From an experimental and demonstration standpoint, this is mechanically and mathematically much like placing a weight on a rubber sheet, then observing the behavior of other objects rolled in a near-tangential path. General Relativity has to date passed every experimental test devised for it, making it one the best verified theories in Physics . Surprisingly it is has proven to be quite useful to creation science and it actually supports some aspects of Biblical teaching.

9. General Relativity
General relativity is a theory of gravitation and to understand the background to the theory we have to look at how theories of gravitation developed.
http://www.gap-system.org/~history/HistTopics/General_relativity.html
##### General relativity
Mathematical Physics index History Topics Index
Version for printing
General relativity is a theory of gravitation and to understand the background to the theory we have to look at how theories of gravitation developed. Aristotle 's notion of the motion of bodies impeded understanding of gravitation for a long time. He believed that force could only be applied by contact; force at a distance being impossible, and a constant force was required to maintain a body in uniform motion. Copernicus 's view of the solar system was important as it allowed sensible consideration of gravitation. Kepler 's laws of planetary motion and Galileo 's understanding of the motion and falling bodies set the scene for Newton 's theory of gravity which was presented in the Principia in 1687. Newton 's law of gravitation is expressed by F G M M d where F is the force between the bodies of masses M M and d is the distance between them. G is the universal gravitational constant. After receiving their definitive analytic form from Euler Newton 's axioms of motion were reworked by Lagrange Hamilton , and Jacobi into very powerful and general methods, which employed new analytic quantities, such as potential, related to force but remote from everyday experience.

10. General Relativity Animations
Animations demonstrating the equivalence principle Scroll down to see all four animations. Accelerating Elevator. An observer in an accelerating elevator
http://www.physics.nyu.edu/~ts2/Animation/general_relativity.html
##### Animations demonstrating the equivalence principle:
Scroll down to see all four animations.
##### Accelerating Elevator
An observer in an accelerating elevator in the absence of a gravitational field (left side) observes the same physical laws as an observer in a stationary elevator in the presence of a gravitational field (right side)
##### Accelerating Elevator - 2
An observer in an accelerating elevator in the absence of a gravitational field (left side) observes the same physical laws as an observer in a stationary elevator in the presence of a gravitational field (right side). The gray line (left side) follows the path of the ball viewed from an inertial frame.
##### Elevator in Freefall
An observer in an elevator in freefall in the presence of a gravitational field (left side) observes the same physical laws as an observer in an inertial frame in the absence of a gravitational field (right side). The gray line follows the path of the ball in the Earth frame (left) and the elevator frame (right).
##### Merry-go-round: A rotating coordinate system (This animation doesn't really demonstrate the equivalence principle)
A person (blue disk) throws a ball (black dot) from the side of a merry-go-round as it spins. The left side shows the path of the ball as viewed from an inertial frame, while the right side shows the path as viewed from the rotating merry-go-round frame.

 11. General Relativity - Wikimedia General relativity or the general theory of relativity is the geometric theory of gravitation published by Albert Einstein in 1916. It is the current description of gravitationhttp://readerfeedback.labs.wikimedia.org/wiki/General_relativity

12. General Relativity Or Newtonian Tidal Effects?
Special attention was given to the possibility that Newtonian tidal effects may account for excess precession, rather than resorting to general relativity
http://gsanctuary.com/general_relativity.html
 ABSTRACT INTRODUCTION SUMMARY NOMINAL ... APPENDIX GENERAL RELATIVITY or NEWTONIAN TIDAL EFFECTS? ABSTRACT In this paper, theoretical tidal effects are derived, (similar to the earth-moon system), and then orbital precession comparisons are made with GR for twenty-two celestial bodies. TOP OF PAGE INTRODUCTION Six prior papers investigated the orbital precessions of the planet Mercury, the moon, the major satellites of Jupiter, Saturn, Uranus, and four binary stars. Special attention was given to the possibility that Newtonian tidal effects may account for excess precession, rather than resorting to general relativity for explanations. In this paper, theoretical tidal effects are derived, (similar to the earth-moon system), and then orbital precession comparisons are made with general relativity for twenty-two celestial bodies. TOP OF PAGE SUMMARY 1) Quite surprisingly, the derived nominal tidal effects model duplicates general relativity precessions for all celestial bodies in the solar system. However, for two binary stars, (DI Herculis and AS Camelopardalis), GR predicts double the measured orbital precessions, while the NTE model duplicates the measured values. The results of this investigation indicate that NTE provides better correlation with measured orbital precessions than does GR. 2) For the binary pulsar, (PSR1913+16), GR duplicates the measured orbital precession of 422 degrees per century, with a solar mass combination of 1.4/1.4 and assuming both bodies are neutron stars. With neutron stars the extreme density excludes NTE, which calculates to be only 189 degrees per century. However, a solar mass combination of 4.17/2.5 also duplicates the orbit of PSR1913+16, with NTE producing the measured 422 degrees per century. The 4.17 solar mass might be a neutron star, but the hidden component (2.5 solar mass) could be capable of producing the NTE precession. For this latter mass combination NTE excludes GR, which now calculates to be 727 degrees per century.

13. General Relativity
General Relativity The general theory of relativity derives its origin from the need to extend the new space and time concepts of the special theory of
http://www.oglethorpe.edu/faculty/~m_rulison/Astronomy/Chap 22/Relativity/genera
 General Relativity The general theory of relativity derives its origin from the need to extend the new space and time concepts of the special theory of relativity from the domain of electric and magnetic phenomena to all of physics and, particularly, to the theory of gravitation. As space and time relations underlie all physical phenomena, it is conceptually intolerable to have to use mutually contradictory notions of space and time in dealing with different kinds of interactions, particularly in view of the fact that the same particles may interact with each other in several different wayselectromagnetically, gravitationally, and by way of so-called nuclear forces. Though the general theory of relativity is universally accepted as the most satisfactory basis of the gravitational force now known, it has not been completely fused with quantum mechanics, of which the central concept is that energy and angular momentum exist only in finite and discrete lumps, called quanta. Since the 1920s quantum mechanics has been the sole rationale of the forces that act between subatomic particles; gravitation doubtless is one of these forces, but its effects are unobservably small in comparison to electromagnetic and nuclear forces. Relativistic phenomena in the subatomic realm have been adequately dealt with by merging quantum mechanics with the special, not the general, theory. Many physicists, foremost among them Einstein himself, tried during the first half of the 20th century to enrich the geometric structure of space-time so as to encompass all known physical interactions. Their goal, a unified field theory, remained elusive but was brought nearer during the late 1960s by the successful unification of the electromagnetic and the so-called weak nuclear force.

14. General Relativity
In physics, general relativity is the theory of gravitation published by Albert Einstein in 1915. According to general relativity the force of gravity is a
http://www.fact-index.com/g/ge/general_relativity.html
Main Page See live article Alphabetical index
##### General relativity
In physics general relativity is the theory of gravitation published by Albert Einstein in . According to general relativity the force of gravity is a manifestation of the local geometry of spacetime . Although the modern theory is due to Einstein, its origins go back to the axioms of Euclidean geometry and the many attempts over the centuries to prove Euclid 's fifth postulate, that parallel lines remain always equidistant, culminating with the realisation by Lobachevsky Bolyai and Gauss that this axiom need not be true. The general mathematics of non-Euclidean geometries was developed by Gauss' student, Riemann , but these were thought to be wholly inapplicable to the real world until Einstein had developed his theory of relativity. The theory, in a nutshell, is this: spacetime is curved , in a way that is determined by the presence of matter and energy. In turn, the curvature determines how the matter and energy move. Frequently, this kind of explanation is illustrated by an image something like the following: This image, however, is misleading. Spacetime should not be thought of as being embedded in a higher-dimensional flat space with the "weight" of massive objects "stretching" the "trampoline-like spacetime fabric" and trajectories around this "dent" being curved due to the pull of gravity in some higher dimension due to the "slope" of the "trampoline"...

15. General Relativity - Definition
General relativity (GR) or general relativity theory (GRT) is the theory of gravitation published by Albert Einstein in 1915. The conceptual core of general
http://www.wordiq.com/definition/General_relativity
##### General relativity - Definition
General relativity (GR) or general relativity theory (GRT) is the theory of gravitation published by Albert Einstein in . The conceptual core of general relativity, from which its other consequences largely follow, is the Principle of Equivalence , which describes gravitation and acceleration as different perspectives of the same thing, and which was originally stated by Einstein in as:
We shall therefore assume the complete physical equivalence of a gravitational field and the corresponding acceleration of the reference frame . This assumption extends the principle of relativity to the case of uniformly accelerated motion of the reference frame.
In other words, he postulated that no experiment can locally distinguish between a uniform gravitational field and a uniform acceleration. The meaning of the Principle of Equivalence has gradually broadened, in consonance with Einstein's further writings, to include the concept that no physical measurement within a given unaccelerated reference system can determine its state of motion. This implies that it is impossible to measure, and therefore virtually meaningless to discuss, changes in fundamental physical constants, such as the rest masses or electrical charges of elementary particles in different states of relative motion. Any measured change in such a constant would represent either experimental error or a demonstration that the theory of relativity was wrong or incomplete.

16. General Relativity - Wikiversity
Jan 3, 2010 General Relativity, also known as the General Theory of Relativity, is an extension of special relativity, dealing with curved coordinate
http://en.wikiversity.org/wiki/General_relativity
##### General relativity
From Wikiversity Jump to: navigation search Search for General relativity on Wikipedia Search Wikimedia Commons for images, sounds and other media related to: General relativity Search for General relativity on the following projects: Educational level : this is a secondary education resource. Educational level : this is a tertiary (university) resource. Subject classification : this is a physics resource . General Relativity , also known as the General Theory of Relativity , is an extension of special relativity , dealing with curved coordinate systems, accelerating frames of reference, curvilinear motion, and curvature of spacetime itself. It could be said that general relativity is to special relativity as vector calculus is to vector algebra. General relativity is best known for its formulation of gravity as a fictitious force arising from the curvature of spacetime. In fact, "general relativity" and "Einstein's formulation of gravity" are nearly synonymous in many people's minds. The general theory of relativity was first published by Albert Einstein in 1916.

17. General Relativity - Includipedia, The Inclusionist Encyclopaedia
TemplateSeeintro General relativity (GR) or General theory of relativity (GTR) is the geometrical theory of gravitation published by Albert Einstein in 1915/16. It unifies
http://www.includipedia.com/wiki/General_relativity
##### From Includipedia, the inclusionist encyclopedia
Jump to: navigation search Template:Seeintro General relativity GR ) or General theory of relativity GTR ) is the geometrical theory of gravitation published by Albert Einstein in 1915/16. It unifies special relativity Newton's law of universal gravitation , and the insight that gravitational acceleration can be described by the curvature of space and time , this latter being produced by the mass energy and momentum content of the matter in spacetime General relativity is distinguished from other metric theories of gravitation by its use of the Einstein field equations to relate spacetime content and spacetime curvature. The field equations are a system of partial differential equations whose solution gives the metric tensor of spacetime, describing its "shape". In the resulting geometry, an object moving inertially in a gravitational field is viewed as following a geodesic path that may be found using the Christoffel symbols of the metric. Solutions of the Einstein field equations model gravitating systems, especially important ones exhibiting spherical symmetry, notable examples being the Schwarzschild solution , the Reissner-Nordström solution and the Kerr metric General relativity is currently the most successful gravitational theory, being almost universally accepted and well-supported by observations.

18. Database Error - Free Net Encyclopedia
One of the defining features of general relativity is the idea that gravitational 'force' is replaced by geometry. In general relativity, phenomena that in classical mechanics
http://www.netipedia.com/index.php/General_relativity
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##### From Free net encyclopedia
A database query syntax error has occurred. This may indicate a bug in the software. The last attempted database query was: (SQL query hidden) from within function " MediaWikiBagOStuff:_doquery ". MySQL returned error " Retrieved from " http://www.netipedia.com/index.php/General_relativity Views Personal tools Search Partner sites

19. Remarks On General Relativity
In Einstein s little book Relativity the Special and the General Theory, he introduces general relativity with a parable. He imagines going into deep space
http://galileo.phys.virginia.edu/classes/252/general_relativity.html
##### Modern Physics
Michael Fowler, University of Virginia
previous ... next
##### Remarks on General Relativity
Michael Fowler
University of Virginia Relativity: the Special and the General Theory being inside
the (from an outside perspective) uniformly accelerating room is physically equivalent to being in a uniform gravitational field . This is the basic postulate of general relativity. Special relativity said that all inertial frames were equivalent. General relativity extends this to accelerating frames, and states their equivalence to frames in which there is a gravitational field. This is called the Equivalence Principle It is important to realize that this equivalence between a gravitational field and acceleration is only possible because the gravitational mass is exactly equal to the inertial mass. There is no way to cancel out electric fields, for example, by going to an accelerated frame, since many different charge to mass ratios are possible.

20. General Relativity: Facts, Discussion Forum, And Encyclopedia Article
Geometry arose as the field of knowledge dealing with spatial relationships. Geometry was one of the two fields of premodern mathematics, the other being the study of numbers .
http://www.absoluteastronomy.com/topics/General_relativity
Home Discussion Topics Dictionary ... Login General relativity
##### General relativity
Overview
General relativity or the general theory of relativity is the geometric Geometry Geometry arose as the field of knowledge dealing with spatial relationships. Geometry was one of the two fields of pre-modern mathematics, the other being the study of numbers....
theory
Theoretical physics Theoretical physics is a branch of physics which employs mathematical models and abstractions of physics in an attempt to explain natural phenomena. Its central core is mathematical physics, Sometimes mathematical physics and theoretical physics are used synonymously to refer to the...
of gravitation Gravitation Gravitation, or gravity, is one of the four fundamental interactions of nature , in which objects with mass attract one another....
published by Albert Einstein Albert Einstein Albert Einstein was a theoretical physicist, philosopher and author who is widely regarded as one of the most influential and best known scientists and intellectuals of all time. He is often regarded as the father of modern physics...
in 1915. It is the current description of gravitation in modern

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