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Terms: relativity
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- Science > Physics > Relativity
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- Relativity (Time)
Provides audio of Einstein explaining that energy equals mass times the velocity of light squared. 1-00
- Relativity - Einstein's General Theory of Relativity (Humboldt)
Provides a description of Einstein's general theory of relativity. Written in layman's language, but assumes a good understanding of physics. 6-02
- Relativity - Proofs of Einstein's General Theory of Relativity (WhyFiles)
Describes the proofs concluded so far for Einstein's general theory of relativity. Written for students. 6-02
- Relativity - Einstein's General Theory of Relativity (Lycos)
Provides a description of Einstein's general theory of relativity. 6-02
- Relativity
- General Relativity (Wikipedia.org)
"General relativity (GR) or General relativity theory (GRT) is the theory of gravitation published by Albert Einstein in 1915." 10-04
- Special Relativity (Wikipedia.org)
"The Special relativity (SR) or Special theory of relativity is the physical theory published in 1905 by Albert Einstein. It replaced Newtonian notions of space and time, and incorporated electromagnetism as represented by Maxwell's equations. The theory is called "special" because it is a "special" case of Einstein's principle of relativity where the effects of gravity can be ignored." 10-04
- Combining Relativity and Quantum Theory (Physics.Weber.edu)
"The two major physics discoveries of the first part of this century, quantum mechanics and Einstein's theory of special relativity present new challenges when treated together. The energy "uncertainty" introduced in quantum theory combines with the mass-energy equivalence of special relativity to allow the creation of particle/anti-particle pairs by quantum fluctuations when the theories are merged. As a result there is no self-consistent theory which generalizes the simple, one-particle Schrödinger equation into a relativistic quantum wave equation."
"The most successful approach to this problem, developed in the early 30's, begins not with a single relativistic particle, but with a relativistic classical field theory, such as Maxwell's theory of electromagnetism. This classical field theory is then "quantized" in the usual way and the resulting quantum field theory realizes a consistent combination of quantum mechanics and relativity. However, this theory is inherently a many-body theory with the quanta of the normal modes of the classical field having all the properties of physical particles." 01-06
- Boy Genius Challenges Einstein's Theory of Relativity (Time.com)
"Could Einstein's Theory of Relativity be a few mathematical equations away from being disproved? Jacob Barnett of Hamilton County, Ind., who is just weeks shy of his 13th birthday, thinks so. And, he's got the solutions to prove it." 03-11
- The Theory of Everything - Merging Quantum Fields and Relativity (YouTube.com)
"Two-part documentary which deals with two of the deepest questions there are - what is everything, and what is nothing?" 07-20
- Noether, Emmy (Association for Women in Mathematics)
Provides a very brief biography of the woman who "mathematically proved two of the propositions that formed a cornerstone for the theory of general relativity." 6-00
- Witten, Edward - Profile (BBC News)
Known for his contributions to the "Theory of Everything" which ties quantum mechanics, the world of the very small to relativity, the world of the very large. His contributions to superstring theory is particularly noted. He has achieved "the highest honour that a mathematician can receive, namely a Fields Medal." 11-03
- AntiMatter (Lawrence Berkeley National Laboratory - Nuclear Science Division)
"In 1930, Paul Dirac developed the first description of the electron that was consistent with both quantum mechanics and special relativity. One of the remarkable predictions of this theory was that an anti-particle of the electron should exist." 7-04
- Superstring Theory (Wikipedia.org)
"Superstring theory is an attempt to explain all of the particles and fundamental forces of nature in one theory by modeling them as vibrations of tiny supersymmetric strings."
"At present, the deepest problem in theoretical physics is harmonizing the theory of general relativity, which describes gravitation and applies to large-scale structures (stars, planets, galaxies), with quantum mechanics which describes the other three fundamental forces acting on the microscopic scale." 10-04
- Space-Time (Wikipedia.org)
"In special relativity and general relativity, time and three-dimensional space are treated together as a single four-dimensional manifold called spacetime (alternatively, space-time)." 10-04
- Editorial - One Country, Two Moralities (AlterNet.org - Cooperman)
Provides a progressive view of the divisions in the nation revealed by voting preferences for the president."
"There are indeed sides, but the dividing line is not morality. It is the ability to tolerate uncertainty, complexity, ambiguity, unknowability, relativity."
"And this tolerance is less a matter of brainpower than of temperament."
"The asymmetry occasionally perturbs me, because I can appreciate their tastes far more readily than they can appreciate mine. But I would wager that our differences have even more to do with genes than they do with upbringing or education. Desire for novelty and risk aversion are both hardwired."
"So I must abandon the solace of thinking my political opponents benighted, uneducated and cognitively impaired."
"But I refuse to think them more moral."
"There are as many moral values at stake in opposing the slaughter of innocent Iraqi children as there are in opposing the abortion of innocent unborn children. As much moral sensitivity in defending the world's wilderness from exploitation as in defending our ... er ... homeland security. And as much moral courage in supporting the rights of people of all sexual orientations as in supporting traditional marriage."
"How does one participate in a democracy in which more than half the people want righteous certainty at any cost – and a significant minority despises this certainty as ignorance, bigotry and cruelty?" 09-13
- Quantum Mechanics (Wikipedia.org)
"Quantum mechanics is a fundamental physical theory that replaces Newtonian mechanics and classical electromagnetism at the atomic and subatomic levels and is the underlying framework of many fields of physics and chemistry, including condensed matter physics, quantum chemistry, and particle physics. Along with general relativity, it is one of the pillars of modern physics." 01-06
- The Standard Model (Wikipedia.org)
"The Standard Model of particle physics is a theory which describes the strong, weak, and electromagnetic fundamental forces, as well as the fundamental particles that make up all matter. Developed between 1970 and 1973, it is a quantum field theory, and consistent with both quantum mechanics and special relativity. To date, almost all experimental tests of the three forces described by the Standard Model have agreed with its predictions. However, the Standard Model is not a complete theory of fundamental interactions, primarily because it does not describe the gravitational force." 01-06
- Quantum Field Theory (Theory.Caltech.edu)
"The framework in which quantum mechanics and special relativity are successfully reconciled is called quantum field theory. It is based on three basic principles: two of them, of course, are quantum mechanics and special relativity. The third one, which I wish to emphasize, is the postulate that elementary particles are point-like objects of zero intrinsic size. In practice, they are smeared over a region of space due to quantum effects, but their descripton in the basic equations is as mathematical points." 01-06
- Loop Quantum Gravity (Wikipedia.org)
"Loop quantum gravity (LQG) is a proposed theory of spacetime which is built from the ground up with the idea of spacetime quantization via the mathematically rigorous theory of loop quantization. It preserves many of the important features of general relativity, such as local Lorentz invariance, while at the same time employing quantization of both space and time at the Planck scale in the tradition of quantum mechanics."
"This is not the most popular theory of quantum gravity; many physicists have philosophical problems with it. For one thing, the critics of this theory say that LQG is one theory of gravity and nothing more. There are many other theories of quantum gravity, and a list of them can be found on the Quantum gravity page." 01-06
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