21. Hyperspace GR Hypertext Includes links to online journals, news and preprint archives, as well as lists of faculty at this Category Science Physics Relativity...... The general relativity News Archives. general relativity and QuantumCosmology Preprints. These are at the preprint database at LANL. http://axion.physics.ubc.ca/hyperspace/

Welcome to HyperSpace , a set of hypertext based services for general relativity research provided by the UBC general relativity and cosmology group. We have the following: Information on the UBC GR group Software for finding GR mail addresses GR News Archives Preprint searches ... Other GR groups The UBC GR group We're part of the theoretical physics group located in the physics department of the beautiful UBC campus in Vancouver, BC, and are working in pretty much all areas of gravity research. Here you can find out who we are, and a little bit about what we're doing: Faculty Members Research Associates, Postdocs and Visitors Address searches Here we have a nifty forms-based program, GR, that searches a list of e-mail and snail mail addresses important to the GR community. The list and software comes from QMW , but the software was originally developed at UBC . It has many personas that cross-reference each other in an intelligent way so that searching is made easy. It also gives links to various preprint databases. We have the following: GR the full forms-based program or you can access a simple version of each persona if you do not have forms support: GR/people Finds the e-mail and snail mail addresses of people in the GR community.

22. Modern Relativity Modernrelativity Special General Black Hole Mass Energy Einste For info on special relativity try our special relativity unit Unit I - SpecialRelativity. general relativity Preface. Foundations For general relativity. http://www.geocities.com/zcphysicsms/

By David Waite Modern Relativity These units explain general relativity only. We assume that the reader already has a full understanding of special relativity . For info on special relativity try our special relativity unit - Unit I - Special Relativity General Relativity Preface Unit II Foundations For General Relativity Chapter 4 Starting GR 4.1 - The Conceptual Premises For GR 4.2 - Tensors in GR 4.3 - The Metric and Invariants of GR ... 6.3 - Stress Energy of Matter and Einstein's Field Equations Unit III Using General Relativity Chapter 7 Electromagnetism in GR 7.1 - Maxwell's Equations 7.2 - Larmor Radiation and the Abraham-Lorentz Formulae Chapter 8 Robertson-Walker and the Big Bang ... 9.2 - Newtonian Limit Vs Gravitomagnetism Unit IV Black Holes Chapter 10 The Schwarzschild Black Hole 10.1 - The Schwarzschild Solution 10.2 - Hovering over a Schwarzschild Black Hole 10.3 - "Apparently" Lighter With Speed ... 11.2 - Hawking Radiation Unit V Fringe Physics in General Relativity Chapter 12 The New Frontiers 12.1 - Metric Engineering 12.2 - Wormholes 12.3 - Time Travel ... Appendix A : Newtonian-Relativistic Comparisons Appendix B : Planck - SI Unit Conversion Index Misc Good Web Pages Email the author: WaiteDavid137@yahoo.com

23. General Relativity Made Simple Advanced Physics Made Simple. general relativity. Where general relativity isneeded is in the presence of heavy objects or large amounts of energy. http://www.geocities.com/autotheist/Physics/gr.htm

Advanced Physics Made Simple General Relativity Introduced by Albert Einstein in 1915, this theory was developed to generalize the theory of special relativity . Contrary to the stories told by many high school physics teachers, special relativity does cover accelerating objects, but the math is difficult. Where general relativity is needed is in the presence of heavy objects or large amounts of energy. The physics of general relativity is very simple: MASS AND ENERGY CURVE SPACE AND TIME and Einstein gave the equation which actually determines the relationship. The rest of general relativity is based on the mathematics of curved surfaces. Tests of General Relativity The most exciting test of general relativity is the PERIHELION OF MERCURY. Since the middle ages, it has been observed that the planet mercury travels along an ellipse (a squashed circle), and that the orbit shifts a little each year. The observed movement was a rotation of about 42 degrees per year. According to general relativity, the shift is 43 degrees per year, which convinced the world the general relativity was a correct theory. Another test is the GRAVITATIONAL REDSHIFT. According to general relativity, light will change color as it gets closer to the surface of the Earth. When researchers carefully measured light at the top and bottom of a tall building, they found exactly the same result! Unfortunately it was later shown that the same effect occurs in quantum mechanics without using general relativity.

24. General Relativity general relativity. general relativity is the theory of spacetime structureand gravitation formulated by Einstein in 1915. Present http://efi.uchicago.edu/general_relativity.txt.html

General Relativity General relativity is the theory of spacetime structure and gravitation formulated by Einstein in 1915. Present day research in general relativity focuses mainly on three major areas: (1) mathematical aspects of the classical theory of general relativity, (2) implications of the theory for astrophysics and cosmology and (3) the quantum theory of gravitation. Research in all of these areas is actively pursued at Chicago. Although the classical theory of general relativity is a complete, well-formulated theory, the equations of the theory are sufficiently difficult to solve in general situations that we still do not know precisely what the theory predicts in a wide variety of circumstances. Thus, a great deal of effort has gone into proving general theorems about aspects such as the inevitability of gravitational collapse to singularities under a wide variety of initial conditions. In addition, because of the basic framework of the theory abandons the pre-assigned, rigid spacetime structure of special relativity, the definition of such an elementary property as the angular momentum of an isolated system becomes highly nontrivial and a number of other simple issues regarding properties of isolated systems have not been resolved. Research in these and other mathematical aspects of classical general relativity is actively pursued at Chicago, primarily by Robert Geroch. One of the most striking consequences of general relativity is its prediction of the existence of black holesthe "regions of no escape" formed by the complete gravitational collapse of a body. It has been proven that black holes are uniquely determined by their mass, angular momentum, and electric charge, and many remarkable predictionssuch as the possibility of the extraction of energy from a rotating black holehave been made. In addition, the equations describing the propagation of small electromagnetic and gravitational disturbances near a black hole possess many remarkable properties. Research in this area has been actively pursued at Chicago.

25. General Relativity And Black Holes A set of notes on aspects of black holes.Category Science Physics Relativity Black Holes......general relativity and Black Holes. How is the geometry around a BlackHole? A Black Hole is one of the most fascinating objects http://www.astro.ku.dk/~cramer/RelViz/text/exhib1/exhib1.html

General relativity and Black Holes. How is the geometry around a Black Hole? A Black Hole is one of the most fascinating objects in the universe, and it can be understood on basis of Einstein's general theory of relativity. In the following pages, you will get an impression of how the curvature changes near a Black Hole, what happens when the hole rotates, and what special effects the Black Hole has on particles and light moving close to the Black Hole. I will not go in much detail with the formulas, because the aim of this World Wide Web Exhibition is presentation and graphics. You can, if you want, read all the relevant details about metric tensors of Black Holes in this hypertext about "Geometry Around Black Holes". Instead, I will use some of the fundamental results to get a view of the geometry around a Black Hole. I will concentrate on curvature and the trajectories of relativistic particles. In flat (euclidian) space, bodies move in a background of space and time. Newton called it absolute space and absolute time. Einstein changed this view radically in 1915 when he completed his general theory of relativity which resulted in a unified 4-dimensional space-time . All distances along a world line are called separations , and they are measured by the metric: This metric defines flat Minkowski space-time , and is much like Newtons absolute space plus a time dimension (note the sign of the time is negative).

26. General Relativity ) general relativity (and a treatment of tensors). To visit that site, click hereto enter the TrekZone. Astrophysical Implications of general relativity. http://www.home.gil.com.au/~praxis/gr/

Hi there! This page is dedicated to my favourite area of physics. Here you will find heaps of mathematical derivations and info on General Relativity (GR), astrophysical implications of GR, data on planets of the Solar System, and comments on all things astrophysical. Although there will be quite a bit of text, this page is meant to be more of a mathematical source of information. As a final note, this page is under construction. In fact, you'll probably find sections with no info! I get to update this page a few times a year, so come back once in a while. :) General Relativity (and a treatment of tensors) This section of my site on deals with Albert Einstein's General Theory of Relativity. This section is continuing to expand as I learn more new and interesting things about GR. I get to do most of my reading in the summer holidays, so you can propably expect this section to get updated about once a year. Please note that this site is still under construction, so some of the links won't work yet! This section is meant to be an online reference to General Relativity, providing a 'no frills' approach. It is more of a summary, with derivations of just about every single equation included. By "summary," I mean that I do not go into detail explaining every single step. I assume, for example, that the reader fully understands the Einstein summation convention, and is familiar with any references made to Special Relativity. But don't let this warning scare you! Read on - there are things which will interest even the most casual reader.

27. General Relativity Introduction to general relativity. Problems with Newtonian Gravity.Newton Thus was born the general theory of relativity. Einstein's http://www.physics.fsu.edu/Courses/Spring98/AST3033/Relativity/GeneralRelativity

Introduction to General Relativity Problems with Newtonian Gravity Newton was fully aware of the conceptual difficulties of his action-at-a-distance theory of gravity. In a letter to Richard Bentley Newton wrote: It is inconceivable, that inanimate brute matter should, without the mediation of something else, which is not material, operate upon, and affect other matter without mutual contact; as it must do, if gravitation, ...., be essential and inherent in it. And this is one reason, why I desired you would not ascribe innate gravity to me. That gravity should be innate, inherent, and essential to matter, so that one body may act upon another, at a distance through vacuum, without the mediation of anything else, by and through their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man who has in philosophical matters a competent faculty of thinking, can ever fall into it." So, clearly, Newton believed that something had to convey gravitational influence from one body to another. When later it became clear that influences travel at finite speeds it was reasonable to suppose this true of gravity also. But Newton's law of gravity did not incorporate the finite travel time of gravitational influences. If right now the sun were to be destroyed by a passing black hole we would not feel the gravitational effects until about 8 minutes had elapsed. Because Newton's law did not include such retardation effects, and permitted violations of special relativity, it was clear that Newton's law had to be an approximation to the correct law of gravity.

28. [gr-qc/9911051] Complex Geometry Of Nature And General Relativity A paper by Giampiero Esposito attempting to give a self-contained introduction to holomorphic ideas Category Science Physics Mathematical Physics......general relativity and Quantum Cosmology, abstract grqc/9911051. From Giampiero 124kb)Complex Geometry of Nature and general relativity. Author http://arxiv.org/abs/gr-qc/9911051

General Relativity and Quantum Cosmology, abstract gr-qc/9911051 From: Giampiero.Esposito@na.infn.it Date: Mon, 15 Nov 1999 11:06:50 GMT (124kb) Complex Geometry of Nature and General Relativity Author: Giampiero Esposito Comments: 229 pages, plain Tex Report-no: DSF preprint 99/38 An attempt is made of giving a self-contained introduction to holomorphic ideas in general relativity, following work over the last thirty years by several authors. The main topics are complex manifolds, spinor and twistor methods, heaven spaces. Full-text: PostScript PDF , or Other formats References and citations for this submission: SLAC-SPIRES HEP (refers to , cited by , arXiv reformatted); CiteBase (autonomous citation navigation and analysis) Links to: arXiv gr-qc find abs

29. General Relativity And Quantum Cosmology general relativity and Quantum Cosmology (since 7/92). index to grqc titles/authors;get gr-qc/abstract; help. e-Prints are available for the following years http://arxiv.org/archive/gr-qc

General Relativity and Quantum Cosmology (since 7/92) index to gr-qc titles/authors get gr-qc/abstract help e-Prints are available for the following years: Additional: new gr-qc papers received (most recent mailing) recent gr-qc listings current month's gr-qc listings lastupdate of daily changes to gr-qc database (ftp format) some info for gr-qc Links to: arXiv gr-qc find abs

30. General Relativity Group Homepage The general relativity Group consists of four members of the Applied MathematicsGroup, together with a number of postdoctoral research assistants and Ph.D http://www.maths.soton.ac.uk/applied/relativity/

31. Southampton GR Explorer Home Page An introduction to Einstein's theory of general relativity and related topics. These pages include Category Science Physics Relativity......Welcome to the Southampton GR Explorer. On these pages you will find an overviewof Einstein's theory of general relativity and related topics. http://www.maths.soton.ac.uk/relativity/GRExplorer/

32. Electronic Books - By Professor John W An online draft copy of an undergraduate text book by John Norbury (PDF). http://www.uwm.edu/~norbury/ebooks.html

Electronic Books - by Professor John W. Norbury These books are available to freely download. All are still in progress. Elementary mechanics and thermodynamics (250 pages) Solutions manual for mechanics and thermodynamics (110 pages) Quantum Mechanics for undergraduates (300 pages) Quantum Field Theory (100 pages) General Relativity and Cosmology for undergraduates (100 pages) Classical Electrodynamics for undergraduates (100 apges)

33. General Relativity In The Global Positioning System effects of GR on GPSCategory Science Physics Relativity Articles......general relativity in the global positioning system. Neil Ashby Universityof Colorado n_ashby@mobek.colorado.edu. The Global Position http://www.phys.lsu.edu/mog/mog9/node9.html

General relativity in the global positioning system Neil Ashby University of Colorado n_ashby@mobek.colorado.edu The Global Position System (GPS) consists of 24 earth-orbiting satellites, each carrying accurate, stable atomic clocks. Four satellites are in each of six different orbital planes, of inclination 55 degrees with respect to earth's equator. Orbital periods are 12 hours (sidereal), so that the apparent position of a satellite against the background of stars repeats in 12 hours. Clock-driven transmitters send out synchronous time signals, tagged with the position and time of the transmission event, so that a receiver near the earth can determine its position and time by decoding navigation messages from four satellites to find the transmission event coordinates, and then solving four simultaneous one-way signal propagation equations. Conversely, gamma-ray detectors on the satellites could determine the space-time coordinates of a nuclear event by measuring signal arrival times and solving four one-way propagation delay equations. Apart possibly from high-energy accelerators, there are no other engineering systems in existence today in which both special and general relativity have so many applications. The system is based on the principle of the constancy of c in a local inertial frame: the Earth-Centered Inertial or ECI frame. Time dilation of moving clocks is significant for clocks in the satellites as well as clocks at rest on earth. The weak principle of equivalence finds expression in the presence of several sources of large gravitational frequency shifts. Also, because the earth and its satellites are in free fall, gravitational frequency shifts arising from the tidal potentials of the moon and sun are only a few parts in

34. General Relativity ON THIS PAGE Sean M. Carroll Robert P. Geroch Robert M. Wald. GeneralRelativity. Founded College. Theoretical physics, general relativity. http://physics.uchicago.edu/t_rel.html

Research Classes Events People ... Physics Home ON THIS PAGE: Sean M. Carroll Robert P. Geroch Robert M. Wald 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. This work is carried out within the interdisciplinary Enrico Fermi Institute . Some topics of long-standing interest include black holes, quantum field theory in curved spacetime, cosmology, and functional analysis. Sean M. Carroll See Prof. Carroll's entry under Theoretical Astrophysics and Cosmology , or his home page Robert P. Geroch Ph.D., Princeton, 1967. Professor, Dept. of Physics, Enrico Fermi Institute, Committee on Conceptual Foundations of Science , and the College. Theoretical physics, general relativity. Asymptotic Structure of Space-time. R. Geroch. In Asymptotic Structure of Space-time, eds. T.P. Esposito and L. Witten, Plenum Press, 1977. General Relativity from A to B.

35. General Relativity Simulation Contest The purpose of this Contest is to prove general relativity using a (simple) algorithm.Category Science Physics Relativity......Page contains a contest to write a program which uses general relativity. A secondcontest is included to use any Theory. general relativity Simulation Contest. http://users.pandora.be/nicvroom/contest.htm

General Relativity Simulation Contest Description of Contest The purpose of this Contest is to prove General Relativity. The Contest consist of the following task: Write one general purpose program (any programming language will do) which simulates the movement of n objects over a certain period of time. The simulation method used (algorithms), should be based on the Rules of General Relativity. The program should be able to simulate and demonstrate the following examples: Forward movement (perihelion shift) of the planet Mercury (43 arc sec angle) around the Sun. The bending of light around the Sun (1.75 sec). The movement of a binary star system. The stars should spiral together. A clock in a space ship around the Earth. Twin paradox (SR). i.e. at least two clocks should be included. The behaviour of black holes. The results of the simulation should match actual observations. For the rules of General Relativity see the following: General Relativity with John Baez For the most elaborate list of links for General Relativity see: Relativity on the World Wide Web by Chris Hillman , maintained by John Baez For a technical discussion about the problems with numerical simulations regarding General Relativity see: Numerical Relativity If you want more about celestial mechanics simulations informal newsletter

36. Dr. Odenwald's ASK THE ASTRONOMER Page: Relativity FAQs Special general relativity Questions and Answers. The following is a reproductionof the Special and general relativity section of his work. http://einstein.stanford.edu/gen_int/relativity/qanda.html

This information was graciously provided by the NASA-sponsored "Ask the Space Scientist" web page and its author, Dr. Sten Odenwald. The following is a reproduction of the "Special and General Relativity" section of his work. Please visit the site directly How do astronomers tell the difference between the different kinds of redshifts? Could an astronaut use a wrist watch to measure relativistic time dilation? What is it about quantum mechanics that is incompatible with general relativity? ... RETURN to the Question and Answer Index.

37. General Relativity -- From Eric Weisstein's World Of Physics general relativity, References. Adler, R.; Bazin, M.; and Schiffer, M. Introductionto general relativity, 2nd ed. New York McGrawHill, 1975. http://scienceworld.wolfram.com/physics/GeneralRelativity.html

Modern Physics Relativity Theory General Relativity Miscellaneous General Relativity General Relativity A theory invented by Albert Einstein which describes gravitational forces in terms of the curvature in space caused by the presence of mass. The fundamental principle of general relativity asserts that accelerated reference frames and reference frames in gravitation fields are equivalent. General relativity states that clocks run slower in strong gravitational fields (or highly accelerated frames), predicting a gravitational redshift . It also predicts the existence of gravitational lensing gravitational waves gravitomagnetism , the Lense-Thirring effect , and relativistic precession of orbiting bodies. Bardeen-Petterson Effect Bertotti-Robinson Solution Black Hole Black Hole No Hair Theorem ... Schwarzschild Black Hole References Adler, R.; Bazin, M.; and Schiffer, M. Introduction to General Relativity, 2nd ed. New York: McGraw-Hill, 1975. Anderson, J. L. Principles of Relativity Physics. New York: Academic Press, 1967. Bergmann, P. G.

38. General Relativity - Wikipedia Other languages Español. general relativity. general relativity is the commonname for the theory of gravitation published by Albert Einstein in 1915. http://www.wikipedia.org/wiki/General_relativity

Main Page Recent changes Edit this page Older versions Special pages Set my user preferences My watchlist Recently updated pages Upload image files Image list Registered users Site statistics Random article Orphaned articles Orphaned images Popular articles Most wanted articles Short articles Long articles Newly created articles All pages by title Blocked IP addresses Maintenance page External book sources Printable version Talk Log in Help Other languages: Polski General relativity From Wikipedia, the free encyclopedia. General Relativity is the common name for 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 Bolyai and Gauss that this axiom need not be true. The general mathematics of non-Euclidean geometries was developed by Gauss' student

39. [physics/9908041] Gravitational Waves: An Introduction This paper presents an elementary introduction to the theory of gravitational waves. This article is meant for students who have had an exposure to general relativity, but results from general relativity have been derived in the appendices. http://xxx.lanl.gov/abs/physics/9908041

Physics, abstract physics/9908041 Gravitational Waves: An Introduction Authors: Indrajit Chakrabarty Comments: Lecture notes presenting an elementary introduction to the theory of gravitational waves. To be submitted to Resonance, Journal of Science Education with a lesser mathematical content. For later revisions, see this http URL Subj-class: Physics Education; Popular Physics In this article, I present an elementary introduction to the theory of gravitational waves. This article is meant for students who have had an exposure to general relativity, but, results from general relativity used in the main discussion have been derived and discussed in the appendices. The weak gravitational field approximation is first considered and the linearized Einstein's equations are obtained. We discuss the plane wave solutions to these equations and consider the transverse-traceless (TT) gauge. We then discuss the motion of test particles in the presence of a gravitational wave and their polarization. The method of Green's functions is applied to obtain the solutions to the linearized field equations in presence of a nonrelativistic, isolated source. Full-text: PostScript PDF , or Other formats References and citations for this submission: CiteBase (autonomous citation navigation and analysis) Links to: arXiv physics find abs

40. NOVA Online/Einstein Revealed/Relativity (Lightman Essay) that light rays from distant stars were deflected by the gravity of the sun in justthe amount he had predicted in his theory of gravity, general relativity. http://www.pbs.org/wgbh/nova/einstein/relativity/

Relativity and the Cosmos by Alan Lightman In November of 1919, at the age of 40, Albert Einstein became an overnight celebrity, thanks to a solar eclipse. An experiment had confirmed that light rays from distant stars were deflected by the gravity of the sun in just the amount he had predicted in his theory of gravity, General Relativity. General Relativity was the first major new theory of gravity since Isaac Newton's, more than two hundred and fifty years earlier. Einstein became a hero, and the myth building began. Headlines appeared in newspapers all over the world. On November 8, 1919, for example, the London Times had an article headlined: "The Revolution In Science/Einstein Versus Newton." Two days later, The New York Times' headlines read: "Lights All Askew In The Heavens/Men Of Science More Or Less Agog Over Results Of Eclipse Observations/Einstein Theory Triumphs." The planet was exhausted with World War I, eager for some sign of humankind's nobility, and suddenly here was a modest scientific genius, seemingly interested only in pure intellectual pursuits. What was General Relativity? Einstein's earlier theory of time and space, Special Relativity, proposed that distance and time are not absolute. The ticking rate of a clock depends on the motion of the observer of that clock; likewise for the length of a "yard stick." Published in 1915, General Relativity proposed that gravity, as well as motion, can affect the intervals of time and of space.

Page 2     21-40 of 107    Back | 1  | 2  | 3  | 4  | 5  | 6  | Next 20