General Relativity
By making precise measurements of gravitational radiation, astronomers will be able to test the predictions of Einstein's Theory of General Relativity. Scientists want to know, "Does time really freeze near a black hole?
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, ...
Definition: General Relativity: The geometric theory of gravitation developed by Albert Einstein, ...
General relativity
Wikipedia, the free encyclopedia - Cite This Source ...
general relativity
the theory of relativity governing accelerated motion that describes gravity as a curvature of space-time
german equatorial mount ...
General relativity: The theory of gravitation developed by Albert Einstein. The theory has consequences for the bending of light by massive objects, the nature of black holes, and the fabric of space and time.
General Relativity
Observers can not distinguish locally between inertial forces due to acceleration and uniform gravitational forces due to the presence of a massive body.
General Relativity
(a) Specific theory of gravitation in terms of curved space-time developed by Einstein; provides field equations to determine the space-time metric for a given distribution of matter.
GENERAL RELATIVITY
General Relatiity is a theory formulated by Albert Einstein. General Relativity expands the theory of Special Relativity to include acceleration and gravity, both of which are explained via the curvature of space-time.
...
General relativity- the theory of relativity that describes how matter behaves in the presence of strong gravitational fields
Geodesic- the shortest (or longest) path between two points ...
[7] GENERAL RELATIVITY
* One thing that is apparent is that Special Relativity's modifications to traditional concepts of space and time are not arbitrary. They follow specific rules and have to add up according to them.
Other General Relativity Sites Worth Checking Out
Spacetime Wrinkles: Although the site was created in 1995, there is still a lot of great material here for the general public.
General relativity is what results when gravity is included in the framework of special relativity. In 1915 Einstein made the connection between special relativity and gravity with the following famous "thought experiment.
General relativity describes mass as changing the shape of spacetime, and the shape of spacetime as describing how matter moves through space.
General Relativity expands the theory to include acceleration and gravity, both of which are explained via the curvature of space-time.
Q: How do you go to the bathroom in space?
from Julia, South Rutland, Ny, United States; April 23, 2001
A: .
General Relativity expands the theory of special relativity to include acceleration and gravity, both of which are explained via the curvature of space-time.
General relativity (as well as most other metric theories of gravity) not only says that black holes can exist, but in fact predicts that they will be formed in nature whenever a sufficient amount of mass gets packed in a given region of space, ...
- General Relativity - an overview of Einstein's theory of general relativity
- Theory of Relativity - an overview of Einstein's theory of relativity ...
In general relativity, one usually talks about spacetime and cannot cleanly separate space from time.
According to general relativity, gravitation severely modifies space and time near a black hole. As the horizon is approached from outside, time slows down relative to that of distant observers, stopping completely on the horizon.
The theory of general relativity has to be modified if it is to be applied to situations where the matter density is extremely high, in order to take account of the effects of to quantum physics (see also quantum gravity).
Although singularities generally predict inconsistencies in theory, singularities within black holes do not necessarily imply that general relativity is incomplete so long as singularities are always surrounded by event horizons.
First of all, we'll start at a great distance from the black hole, where the effect of it on the space around it (the strong spatial distortion as defined by the laws of General Relativity) is pretty low.
Recall that Einstein's equations of general relativity imply that gravity is equivalent to matter and energy. This means that the gravity of a black hole can in principle be tapped for energy.
Gravity waves were a predicted consequence of Einstein's theory of General Relativity and a confirmed discovery would have been a major achievement.
Before going on to galaxy formation and evolution, it is worthwhile to look at the connections between cosmological models and basic tenets of general relativity for the commonly-considered instance of an expanding Universe in the Friedman model.
Early analysis of the field equation indicated that general relativity allowed dynamic cosmological models only (ones that are either contracting or expanding), but no static models.
Binary pulsars and general relativity
Many stars are members of binary systems, in which two stars orbit around each other with periods of some days or years. A number of binary systems are known in which one of the stars is a neutron star.
Newton's laws of motion and his theory of universal gravitation are the basis for celestial mechanics; for some objects, general relativity is also important.
COSMOLOGICAL CONSTANT (Λ) - Constant introduced by Einstein in 1917 to reconcile his theory of General Relativity with the prevailing assumption that the universe was static, later interpreted as the energy density of the vacuum.
Gravitational waves are predicted by general relativity, but as of early 2006 they have never been detected directly.
One was the advent of relativity theory, first Special Relativity and then General Relativity, promulgated by Albert Einstein with the help of Hermann Minkowski and others, which removed the concept of preferred reference frames from science, ...
To understand a black hole, we need the theory of general relativity. The central idea of general relativity is that the existence of mass will affect the spacetime around it. However, we must have a huge mass to see the effect.
Einstein's theory of general relativity predicts that the wavelength of electromagnetic radiation will lengthen as it climbs out of a gravitational well.
The preceding is not too difficult to visualize, but General Relativity asserts that space itself (not just an object in space) can be curved, and furthermore, the space of General Relativity has 3 space-like dimensions and one time dimension, ...
The central bulge contains at its core a very massive compact object; under the theory of general relativity, this compact object is a black hole. The mass of the central object is estimated to be 3.6 million times the mass of the Sun.
Most astrophysicists dismiss MOND as inconsistent with general relativity, but ways out of this have recently been proposed (see "Seeing Through Dark Matter" by Stacy McGaugh, "Science" 317, p. 607-8, 3 August 2007).
The possibility that the path of light could be bent by the gravity of a large object was predicted by Einstein's Theory of General Relativity, and this effect was observed soon after the theory was published.
Albert Einstein published his theory of General Relativity in 1916, which included the idea that the gravity of a massive object such as the Sun was strong enough to produce curvature in nearby space, ...
A fourth detection method, called gravitational microlensing, comes from one of Einstein's insights in his theory of general relativity: Gravity bends space.
propagating field predicted by general relativity to occur as a result of any large-scale change in the distribution of matter (as in the collapse of a star).
great circle - (n.) ...
As yet, these extremely weak non-electromagnetic waves have never been detected but their existence is predicted by General Relativity.
For a more comprehensive introduction to both Special and General Relativity, see the links at Relativity on the WWW, and The Light Cone (An Illuminating Introduction to Relativity), and Albert Einstein Online ...
cosmological constant A modification of the equations of general relativity that represents a possible repulsive force in the universe. The cosmological constant could be due to the energy density of the vacuum.
Kerr black hole: A solution to the equations of general relativity that describes the properties of a rotating black hole.
kiloparsec (kpc): A unit of distance equal to 1000 pc, or 3260 ly.
"One of the most exciting things about dark energy is that it seems to live at the very nexus of two of our most successful theories of physics: quantum mechanics, which explains the physics of the small, and Einstein's Theory of General Relativity, ...
 See also: Time, Light, Gravitation, Universe, Gravity
|
