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# Topic: Relativity

###### In the News (Mon 24 Sep 18)

 General relativity - Wikipedia, the free encyclopedia It unifies special relativity and Isaac Newton's law of universal gravitation with the insight that gravitation is not viewed as being due to a force (in the traditional sense) but rather a manifestation of curved space and time, this curvature being produced by the mass-energy content of the spacetime. In general relativity, phenomena that in classical mechanics are ascribed to the action of the force of gravity (such as freefall, orbital motion, and spacecraft trajectories) are taken in general relativity to represent inertial motion in a curved spacetime. General relativity was developed by Einstein in a process that began in 1907 with the publication of an article on the influence of gravity and acceleration on the behavior of light in special relativity. en.wikipedia.org /wiki/General_relativity   (4302 words)

 Einstein, Albert. 1920. Relativity: The Special and General Theory The Principle of Relativity (In the Restricted Sense) On the Relativity of the Conception of Distance The Space-Time Continuum of the General Theory of Relativity Is not a Euclidean Continuum www.bartleby.com /173   (321 words)

 Relativity Tutorial   (Site not responding. Last check: 2007-10-22) According to relativity, this must be re-expressed as "The magnitude of the relative velocity between your car and the pavement must be less than 70 mph". Special relativity was constructed to satisfy Maxwell's equations, which replaced the inverse square law electrostatic force by a set of equations describing the electromagnetic field. Relativity also leads to interesting objects such as fl holes, but these are not very relevant to cosmology. www.astro.ucla.edu /~wright/relatvty.htm   (3935 words)

 Relativity The theory of special relativity (or special relativity for short) was established in 1905 by the famous physicist Albert Einstein at the age of 26. Special relativity is of importance in the realm of high relative velocities. Relativity is presented with the support of The Knut and Alice Wallenberg Foundation. nobelprize.org /physics/educational/relativity   (92 words)

 NOVA | Einstein's Big Idea | Relativity (Lightman Essay) | PBS The key idea of general relativity, called the equivalence principle, is that gravity pulling in one direction is completely equivalent to an acceleration in the opposite direction. Many of the predictions of general relativity, such as the bending of starlight by gravity and a tiny shift in the orbit of the planet Mercury, have been quantitatively confirmed by experiment. General relativity may be the biggest leap of the scientific imagination in history. www.pbs.org /wgbh/nova/einstein/relativity   (1248 words)

 General Relativity When "generalized" to include gravitation, the equations of relativity predict that gravity, or the curvature of spacetime by matter, not only stretches or shrinks distances (depending on their direction with respect to the gravitational field) but also w ill appear to slow down or "dilate" the flow of time. In the decade after its publication in 1916, Einstein's Theory of General Relativity led to a burst of experimental activity in which many of its predictions were vindicated. These predictions were encapsulated in a series of field equations that laid the foundation for all subsequent research into relativity and partly for modern cosmology as well. archive.ncsa.uiuc.edu /Cyberia/NumRel/GenRelativity.html   (683 words)

 Relativity Relativity is usually thought of as modern physics since it was developed at the start of the 20th century and could only be tested in the realm available to scientists by high technology. The theory of relativity is traditionally broken into two parts, special and general relativity. It is important to note that all the predictions of special relativity, length contraction, time dilation and the twin paradox, have been confirmed by direct experiments, mostly using sub-atomic particles in high energy accelerators. zebu.uoregon.edu /~js/21st_century_science/lectures/lec06.html   (1462 words)

 Relativity The whole thesis of Technical Relativity rests on the second great attribute of 200dmas though, their tendency to act as the major support in a bull market or major resistance in a bear market. Relativity creates a simple objective tool that empowers traders to recognize tradable 200dma extremes while totally eliminating the visual distortions and emotional bias inherent in chart analysis. Relativity is another valuable tool to help us understand when high-probability-for-success trades are possible, but it cannot forecast the future. www.zealllc.com /2004/relativity.htm   (4530 words)

 Relativity: The Special and General Theory The Space-Time Continuum of the Speical Theory of Relativity Considered as a Euclidean Continuum The Structure of Space According to the General Theory of Relativity (sup. Note: The fifth appendix was added by Einstein at the time of the fifteenth re-printing of this book; and as a result is still under copyright restrictions so cannot be added without the permission of the publisher. www.marxists.org /reference/archive/einstein/works/1910s/relative   (277 words)

 sr Modern Relativity modernrelativity special relativity black hole mass energy Einstein time Schwarzschild light speed   (Site not responding. Last check: 2007-10-22) In special relativity we do not consider gravitation, and it is also not a quantum theory. Thus many of the implications of special relativity that are often quoted as if they were general laws do not hold true in more general physics scenarios. Once special relativity is understood, one may move on to a more general case of physics known as general relativity For those that are ready for this step we have created a section on general relativity -Modern Relativity. www.geocities.com /zcphysicsms/sr.htm   (125 words)

 Theory: Special Relativity If I am driving down the freeway at 50 miles per hour relative to the road, a car traveling in the same direction at 55 mph has a speed of only 5 mph relative to me, while a car coming in the opposite direction at 55 mph approaches me at a rate of 105 mph. One of the strangest parts of special relativity is the conclusion that two observers who are moving relative to one another, will get different measurements of the length of a particular object or the time that passes between two events Here we use the same speed, Because the speed of the observer in the lab relative to the tau is just equal to (but in the opposite direction) of the speed of the tau relative to the observer in the lab, so we can use the same speed. www2.slac.stanford.edu /vvc/theory/relativity.html   (2915 words)

 Open Directory - Science: Physics: Relativity General Relativity Simulation Contest - The purpose of this Contest is to prove General Relativity using a (simple) algorithm. Gravity Probe B - Gravity Probe B is the relativity gyroscope experiment being developed by NASA and Stanford University to test two extraordinary, unverified predictions of Albert Einstein's general theory of relativity. Relativity Forum - Forum devoted to discussing the Einstein's special and general theories of relativity. dmoz.org /Science/Physics/Relativity   (745 words)

 Theory of Universal Relativity - Shrinking Theory The concept of relative distance brings a distance dilation process in which speed can be seen as a rate at which objects shrink instead of a rate at which a distance is covered. Relativity proves that the very large is the very small and that Quantum Mechanics is the only thing applicable to the very large and the very small. Relativity explains the mechanic of movements that makes Quantum Mechanics the perfect candidate to explains both the very large and the very small, since I do not really see a very large and a very small anymore. www.crownedanarchist.com /Shrinking.htm   (14655 words)

 Millennium Relativity Millennium relativity is a new theory in relativistic physics that replaces Einstein's special relativity and general relativity theories. It is the result of nine years of independent research aimed at reconciling the principles of physics with the accepted body of experimental evidence. Methodical analysis of the evidence leads to the discovery of significant flaws in the underlying foundations of special and general relativity, and even the classical principles of physics. www.mrelativity.net   (296 words)

 RELATIVITY AND WAVES My works show, that the relativity considered to be revolutionary as compared to the classical mechanics, is in fact only the classical mechanics of elastic mediums, or classical mechanics of waves. Speeds greater than c are not excluded by the formulae of the relativity. These works, accessible to a large scientist public, give a relativity released of all special metaphysics on space and time, that is not the case actually, and allow us to understand duality wave-corpuscle. members.aol.com /sergecabala   (338 words)

 Amazon.com: Relativity : The Special and the General Theory: Books: Albert Einstein   (Site not responding. Last check: 2007-10-22) His major contribution to science was the special and the general theory of relativity, which gave a new dimension to that we call today "Modern Physics". Many people feel frustrated because when they try to understand relativity, they find some authors that expound in their books a complex arrangement of equations referring to the mathematical part of the theory, namely, the books are accessible for people with certain levels of knowledge (that is the case of engineers, physicists, mathematicians, among others). The beauty of relativity (as opposed to QM and Strings) is that it IS accessible to us mere mortals and it IS a sensible and beautiful theory, once you strip away everything else and just think about. www.amazon.com /exec/obidos/tg/detail/-/0517884410?v=glance   (1869 words)

 Howstuffworks "How Special Relativity Works" If you are a fan of science fiction, then you know that "relativity" is a fairly common part of the genre. If you are a fan of science you know that relativity plays a big part there as well, especially when talking about things like fl holes and astrophysics. If you have ever wanted to understand the fundamentals of relativity, then this edition of How Stuff Works will be incredibly interesting to you. www.howstuffworks.com /relativity.htm   (209 words)

 SFB 382 D4 - Virtual Relativity It is part of the project D4 within the Sonderforschungsbereich 382. The project is in cooperation with RUS (Computing Center at the University of Stuttgart). Free download: An early beta version of "Virtual Relativity" is available for Silicon Graphics, Windows 9x, and Windows NT workstations. www.tat.physik.uni-tuebingen.de /~weiskopf/vr   (148 words)

 Lecture Notes on General Relativity   (Site not responding. Last check: 2007-10-22) This set of lecture notes on general relativity has been expanded into a textbook, Spacetime and Geometry: An Introduction to General Relativity, available for purchase online or at finer bookstores everywhere. These lecture notes are a lightly edited version of the ones I handed out while teaching Physics 8.962, the graduate course in General Relativity at MIT, during Spring 1996. Try the No-Nonsense Introduction to General Relativity, a 24-page condensation of the full-blown lecture notes. pancake.uchicago.edu /~carroll/notes   (466 words)

 Albert Einstein and the Theory of Relativity Albert Einstein shook the foundations of physics with the introduction of his Special Theory of Relativity in 1905, and his General Theory of Relativity in 1915 (Here is an example of a thought experiment in There is an extra 43 seconds of arc per century in this precession that is predicted by the Theory of General Relativity and observed to occur (a second of arc is 1/3600 of an angular degree). The General Theory of Relativity predicts that light coming from a strong gravitational field should have its wavelength shifted to larger values (what astronomers call a "red shift"), again contary to Newton's theory. csep10.phys.utk.edu /astr161/lect/history/einstein.html   (631 words)

 Orbits in Strongly Curved Spacetime Kepler's laws of planetary motion, grounded in Newton's theory of gravity, state that the orbit of a test particle around a massive object is an ellipse with one focus at the centre of the massive object. In strong gravitational fields, General Relativity predicts orbits drastically different from the ellipses of Kepler's laws. In 1915, Albert Einstein's General Theory of Relativity extended Newtonian gravitation theory, revealing previously unanticipated subtleties of nature. www.fourmilab.ch /gravitation/orbits   (2354 words)

 gr But, unless you are already familiar with general relativity, to understand these adventures you will need to look at the other material from time to time. General relativity is usually written with lots of superscripts and subscripts. It concentrates on the mathematics of general relativity and other gauge fields, such as Maxwell's equations and the Yang-Mills equations, which describe the strong and electroweak forces. math.ucr.edu /home/baez/gr/gr.html   (732 words)

 Physics Virtual Bookshelf: Relativity The Special Relativity document by Professor Key that is the next listing largely concentrates on the effects predicted by the theory, such as time dilation, length contraction, etc. This document is considerably longer than Professor Key's, and tends to concentrate more on the worldview suggested by the theory. A discussion of the postulates of special relativity and their consequences, from a first year physics course that uses minimal mathematics; the entire set of materials from the course is available by clicking here. A discussion of the general theory of relativity, from a first year physics course that uses minimal mathematics; the entire set of materials from the course is available by clicking www.upscale.utoronto.ca /GeneralInterest/Relativity.html   (319 words)

 General Relativity Founded by Subrahmanyan Chandrasekhar, the General Relativity group at the University of Chicago engages in research across a wide variety of topics in classical and quantum gravitation, as well as forays into astrophysics, condensed matter theory, and mathematical physics. My research mainly has focused upon the theory of quantum phenomena in strong gravitational fields, particularly quantum effects involving fl holes and fl hole thermodynamics. My interests also span attempts to formulate a quantum theory of gravitation (where no background classical metrical or causal structure of spacetime is present), mathematical investigations of classical general relativity, and applications of general relativity to cosmology and astrophysics (such as gravitational lensing phenomena and gravitational radiation reaction effects). physics.uchicago.edu /t_rel.html   (478 words)

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