141. General Relativity general relativity. The basic theory which underlies our current concepts of space, time, matter, and energy, is Einstein s general Theory of relativity (GR). http://www.ess.sunysb.edu/simswg/siswg/node7.html

Next: Reference Frames Up: The Science Enabled by Previous: The Science Enabled by General Relativity The fabric of the universe is described by different theories of gravity. The basic theory which underlies our current concepts of space, time, matter, and energy, is Einstein's General Theory of Relativity (GR). Other theories which are extensions or alternatives to GR show deviations from GR at levels which are at or below the accuracies of current measurements. The accuracies of the proposed SIM will allow various measurement to be made which will test GR against these other theories to an extent never before possible. The relativistic parameter would be determined to one to two orders of magnitude higher accuracy than is presently possible. Such an accuracy would make a definitive distinction between GR and some alternative proposals. With the level of accuracy of SIM, the quadrupole moment of the solar interior, generated by a high angular velocity in the interior, might be detectable. Frame dragging from the rotation of the sun and planets would be detectable. The size of the effects of MACHOs passing in front of stars would allow a determination of the mass of the MACHOs, just at the 1 as level, (c.f. Miyamoto and Yoshii, Astron.J.,110, 1427 August 1995).

142. Time Travel - Fact Or Fiction? The science fiction paradigm, conservation laws, general relativity, paradoxes, tachyons and graphs. http://math.ucr.edu/home/baez/physics/Relativity/GR/time_travel.html

[Physics FAQ] Updated 1994; Original by Jon J. Thaler. Time Travel - Fact or Fiction? We define time travel to mean departure from a certain place and time followed (from the traveller's point of view) by arrival at the same place at an earlier (from the sedentary observer's point of view) time. Time travel paradoxes arise from the fact that departure occurs after arrival according to one observer and before arrival according to another. In the terminology of special relativity time travel implies that the timelike ordering of events is not invariant. This violates our intuitive notions of causality. However, intuition is not an infallible guide, so we must be careful. Is time travel really impossible, or is it merely another phenomenon where "impossible" means "nature is weirder than we think?" The answer is more interesting than you might think. The Science Fiction Paradigm The B-movie image of the intrepid chrononaut climbing into his time machine and watching the clock outside spin backwards while those outside the time machine watch the him revert to callow youth is, according to current theory, impossible. In current theory, the arrow of time flows in only one direction at any particular place. If this were not true, then one could not impose a 4-dimensional co-ordinate system on space-time, and many nasty consequences would result. Nevertheless, there is a scenario which is not ruled out by present knowledge. This usually requires an unusual spacetime topology (due to wormholes or strings in general relativity) which has not yet seen, but which may be possible. In this scenario the universe is well behaved in every local region; only by exploring the global properties does one discover time travel.

143. CGWP UBC Summer School Students attending the school are expected to have completed basic graduate courses, including introductory courses in general relativity and hydrodynamics http://cgwp.gravity.psu.edu/events/GRHydro03/

144. General Relativity And Quantum Cosmology Los Alamos EPrint Archive 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

145. Relativity - The Special And General Theory By Albert Einstein relativity The Special And general Theory by Albert Einstein What one reviewer at amazon said about a href=detail.asp?ASIN=0517025302 relativity The http://www.abacci.com/books/book.asp?bookID=1971

146. Ingenta: All Issues -- General Relativity And Gravitation general relativity and Gravitation, ISSN 00017701 in our archives Volume 29 (1997) through Volume 36 (2004) Publisher Plenum Publishers, http://www.ingenta.com/journals/browse/klu/gerg

guest need help? online articles fax/ariel articles user name password remember me Athens click here to login via Athens Physics/Astronomy Nuclear Physics General Relativity and Gravitation ISSN 0001-7701 in our archives: Volume 29 (1997) through Volume 36 (2004) Publisher: Plenum Publishers LATEST NEXT PREVIOUS EARLIEST Volume 36, Issue 6, June 2004 Volume 36, Issue 5, May 2004 Volume 36, Issue 4, April 2004 Volume 36, Issue 3, March 2004 Volume 36, Issue 2, February 2004 Volume 36, Issue 1, January 2004 Volume 35, Issue 12, December 2003 Volume 35, Issue 11, November 2003 Volume 35, Issue 10, 200310 Volume 35, Issue 9, September 2003 Volume 35, Issue 8, August 2003 Volume 35, Issue 7, July 2003 Volume 35, Issue 6, June 2003 Volume 35, Issue 5, May 2003 Volume 35, Issue 4, April 2003

147. Is The Special Theory Of Relativity Wrong? There follows a proof that the Special Theory of relativity may be wrong. This may also have implications for the general Theory. http://www.webspawner.com/users/relativity/

Is the Special Theory of Relativity Wrong? Author: Greg Alexander Date: 17 Sept 2003 These days it would appear that the Special Theory of Relativity was beyond any form of doubt however I have a theoretical proof that would strongly suggest that the theory is fundamentally flawed. Indeed the proof is so straight forward it is a wonder so many supposedly acute minds have previously overlooked it. The proof runs as follows : Q.E.D. The origin of this scientific red herring lies with the famous (though some may perhaps argue infamous) Michelson-Morley experiment. It was conducted by the two Americans whom it was named after in 1887 in order to prove or disprove the existence of ‘aether’, the enigmatic substance thought to be contained in a vacuum upon which a light wave was able to move upon. The apparatus consisted of two beams of light meeting at right angles at an interferometer. If the Earth’s speed effected either of the velocities of the light beams then the interference pattern obtained would change. However it was found that the speed of the Earth about the Sun did not appear to effect the interference pattern in any way and it was upon this observation that Einstein based his Special Theory of Relativity. However just the briefest look at the exact set-up of the apparatus used by Michelson and Morley clearly reveals that the experiment could never have worked anyway. Indeed the logic supporting it is so flawed it is a wonder that no-one appears to have ever noticed. The two light beams which meet at the interferometer first travel away from it and at equal distances are reflected back again to the same half-silvered glass it started from. However because each light beam exactly doubles back on itself each time, it is obvious what the light beam would have gained as a result of the Earth’s velocity in one direction, it would exactly lose on the way back again in the opposite direction, and vice versa. Indeed the experiment would never have proved or disproved the existence of the aether either.

148. The Confrontation Between General Relativity And Experiment http://relativity.livingreviews.org/Articles/lrr-2001-4/

149. PhysicsWeb - General Relativity Passes Cassini Test general relativity passes Cassini test 24 September 2003. In general relativity the fabric of spacetime is curved by large masses. http://physicsweb.org/article/news/7/9/14

Advanced site search news January February March April May June July August September October November December Show summaries quick search Search the news archive. Previous News for September 2003 Next General relativity passes Cassini test 24 September 2003 Italian astrophysicists have confirmed the predictions of Einstein's general theory of relativity with a precision that is about 50 times better than previous measurements. Bruno Bertotti of the University of Pavia and colleagues in Rome and Bologna measured how radio waves sent from the Earth to the Cassini satellite and back again were deflected by the Sun (B Bertotti et al. Nature 374). Their results, which are accurate to 20 parts in a million, agree with the predictions of general relativity. In general relativity the fabric of space-time is curved by large masses. This curvature is responsible for the force of gravity, and also deflects and delays any photons passing near a large mass, such as the Sun. Previous experiments have measured these effects with an accuracy of 0.1% and found them to be in agreement with the predictions of the theory. Bertotti and colleagues used a new technique to test general relativity to much higher precision. The Italian team took advantage of a chance alignment of the Earth, the Sun and Cassini - which is on its way to Saturn - that occurred in June last year. The experiment relied on Cassini's 4-metre antenna and a new ground station at the NASA Deep Space Network in Goldstone, California. Bertotti and co-workers measured a parameter called gamma that is predicted to have a value of one in general relativity.

150. Project Gutenberg - Bibliographic Record Bibliographic Record. Help on this page. Data. Title relativity The Special And general Theory. Author Einstein, Albert. Language English. http://www.gutenberg.net/etext/5001

H ome P ersonalize Books A uthor: T itle Word(s): How To F ind Advanced ... ecent Books About Us D onate E vents ... ontacts In Depth V olunteering HO W ... ewsletters Bibliographic Record Help on this page Data Title: Relativity : The Special And General Theory Author: Einstein, Albert Language: English Subject: Relativity (Physics) LoC Class: Science Physics Release Date: Feb 2004 Etext number: Files File Type Download File Size HTML (zipped) ibiblio.org select mirror P2P network 177 KB Plain text ibiblio.org select mirror P2P network 219 KB Plain text (zipped) ibiblio.org select mirror P2P network 117 KB If you are located outside of the U.S. you may want to download from a mirror site located near you to improve performance. Permanently select a Mirror Site If you need a special character set, try our new recode facility (experimental) Edit this entry (Project Gutenberg staff only) Most recently updated: 2004-06-11 07:00:00.

151. General Relativity Theory Definition Of General Relativity Theory. What Is Gener Definition of general relativity theory in the Dictionary and Thesaurus. general relativity theory. Word Word. http://www.thefreedictionary.com/general relativity theory

Dictionaries: General Computing Medical Legal Encyclopedia general relativity theory Word: Word Starts with Ends with Definition Noun general relativity theory - a generalization of special relativity to include gravity (based on the principle of equivalence) Einstein's general theory of relativity general relativity general theory of relativity Einstein's theory of relativity ... theory of relativity - (physics) the theory that space and time are relative concepts rather than absolute concepts Legend: Synonyms Related Words Antonyms Some words with "general relativity theory" in the definition: Albert Einstein build on constant cosmological constant ... theory of relativity Previous General Dictionary Browser Next General issue general knowledge general ledger ... General warrant Full Dictionary Browser General protection fault (enc.) General Protection Fault (comic strip) (enc.) General Protection Fault (comic) (enc.) General Public (enc.) General Public Licence (comp.) General Public License (comp.) General Public License (enc.) General Public Virus (comp.)

152. Relativity Tutorial relativity Tutorial The University of California Los Angeles Division of Astronomy and Astrophysics professor Edward Wright maintains the relativity Tutorial Web site. The site explains the http://rdre1.inktomi.com/click?u=http://www.astro.ucla.edu/~wright/relatvty.htm&

153. The Light Cone - An Illuminating Introduction To Relativity (by Rob Salgado) What s new For a new visualization of the Twin Paradox, visit Visualizing Proper Time in Special relativity with LightClocks. http://physics.syr.edu/courses/modules/LIGHTCONE/

Module Content Updated: 4 Dec 2001 Module Content Updated: 2 Jun 1997 Homepage Last modified: Thu Jan 29 08:17:53 2004 click to see this Light Cone rendered in VRML The Light Cone an illuminating introduction to relativity Rob Salgado (salgado@physics.syr.edu) What's new For a new visualization of the Twin Paradox, visit Visualizing Proper Time in Special Relativity [with LightClocks] Older, but still useful: Twin Paradox java applet Animations are available in MPEG and animated-GIF formats. Since March 13, 1996, you are visitor number PREFACE Introduction Unfamiliar Quotations English-Spacetime-Geometry Dictionary PRIMEVAL RELATIVITY EVENTS and SPACETIME Aristotle's Spacetime Introducing the PRINCIPLE OF RELATIVITY: Galileo's Spacetime ... Newton and His Mechanical Laws of Motion SPECIAL RELATIVITY Maxwell and The Electrodynamic Theory of Light Introducing the LIGHT CONE: The Einstein-Minkowski Spacetime Soap Box Seminar Series: The Twin Non-Paradox ... A more illuminating look at the LIGHT CONE GENERAL RELATIVITY Newton, Galileo, and The Laws of Gravitation

154. Cambridge Relativity National Cosmology Supercomputer New! Cosmology. Black holes. Cosmic strings et al. Inflation. Quantum gravity. Movies Research Home Page Stephen Hawking. http://www.damtp.cam.ac.uk/user/gr/public/

National Cosmology Supercomputer - New! Cosmology Black holes National Cosmology Supercomputer - New! Cosmology Black holes ... [Next]

155. Tensors And Relativity A complete online course in tensors and relativity http://vishnu.mth.uct.ac.za/omei/gr/

156. GR17 http://www.gr17.com/

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157. GR17 http://www.dcu.ie/~nolanb/gr17.htm

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158. CCGRRA http://www.math.ualberta.ca/~ccgrra/

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