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	Physical Reality - Relativity
		What Relativity Is Relativity is a catch-all phrase for both the theory of special relativity and the theory of general relativity.
		Special relativity is the theory published by Einstein in 1905.
		Specifically, special relativity says that light is constant, and as velocity increases length decreases, mass increases, and time slows down.
	library.thinkquest.org /C008537/relativity/relativity.html (813 words)

	General relativity
		General relativity is a theory of gravitation and to understand the background to the theory we have to look at how theories of gravitation developed.
		In 1907, two years after proposing the special theory of relativity, Einstein was preparing a review of special relativity when he suddenly wondered how Newtonian gravitation would have to be modified to fit in with special relativity.
		A special case of Emmy Noether's theorem was written down by Weyl in 1917 when he derived from it identities which, it was later realised, had been independently discovered by Ricci in 1889 and by Bianchi (a pupil of Klein) in 1902.
	www-gap.dcs.st-and.ac.uk /~history/HistTopics/General_relativity.html (1995 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.
		Special relativity is now a tool at work, almost daily, in the scientists' calculations and laboratories.
	nobelprize.org /educational_games/physics/relativity (108 words)

	Curious About Astronomy? The Theory of Relativity
		The theory of relativity is perhaps the most successful development in the history of science in terms of its agreement with experimental results and its ability to predict new phenomena - only quantum mechanics can claim to compete with its success.
		Einstein's theory immediately explained some of the major problems in the physics and astronomy of his day, and it has continued to explain new developments that were not even hinted at 90 years ago, including the existence of fl holes and recent observations in cosmology.
		The theory of relativity is required whenever we study objects that are either (a) moving in a strong gravitational field, or (b) moving near the speed of light.
	curious.astro.cornell.edu /relativity.php (2810 words)

	Theory: Special Relativity (SLAC VVC)
		Einstein's Special Theory of Relativity describes the motion of particles moving at close to the speed of light.
		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 (2962 words)

	Relativity
		Einstein was far from being the only person who contributed to the development of the theory of special relativity.
		This theory turned out to be compatible with special relativity, even though special relativity was not known at that time.
		On November 25, nearly ten years after the foundation of special relativity, Einstein submitted his paper The Field Equations of Gravitation for publication, which gave the correct field equations for the theory of general relativity (or general relativity for short).
	nobelprize.org /educational_games/physics/relativity/history-1.html (415 words)

	History of special relativity - Wikipedia, the free encyclopedia
		Max Planck suggested the term "relativity" to highlight the notion of transforming the laws of physics between observers moving relative to one another, and the term 'Special' was later given to it by Einstein in order to distinguish it from the general theory of relativity.
		Herbert Dingle was a respectable astrophysicist who was initially a supporter and book author of relativity, but his interpretation of special relativity was subtly different than Einstein's.
		His 'proof' that special relativity theory is inconsistent was based on its own interpretation of relativity and was largely rejected by other scientists.
	en.wikipedia.org /wiki/History_of_special_relativity (2375 words)

	special relativity
		Relativity is primarily a theory of measurement, and so what is required is an operational definition of time.
		Special Relativity applies to real data, to real observations, and cannot be applied to non-verifiable assumptions or imaginary vectors.
		It is for the situation in which the man on the train is moving relative to the train and the train is moving relative to the embankment (eye).
	geocities.com /mileswmathis/long.html (9990 words)

	The Collapse of Special Relativity
		Many phrases such as "relatively speaking" are well known and generally indicate that all things are equally right; of course this terminology also may indicate the opposite, namely, that all things are equally wrong.
		The theory of Relativity in its two variants General Relativity and Special Relativity has led to an increase in the belief that the universe is a confused and disordered construct with no absolute principle, except for the constancy of the velocity of light in a vacuum, labeled 'c' in the scientific lexicon.
		In Einsteins Special Relativity several other physical measurements including space, time, mass and energy become dependent on perspective and in particular the perceived velocity from the different observers.
	www.relativitycollapse.com (1028 words)

	- Special Relativity (Site not responding. Last check: 2007-10-13)
		The theory of special relativity is the combination of two ideas and their seemingly weird consequences.
		Special relativity shows that measurements of distance and time depend on how fast you are travelling - a result that goes against our everyday experiences.
		But relativity has stood the test of time, and like it or not, the universe really is this strange.
	www.einsteinyear.org /facts/special_relativity (987 words)

	Dave's Relativity Page (Site not responding. Last check: 2007-10-13)
		Special Relativity: This one consists largely of hypothetical experiments for you to think through, that demonstrate some of the results of relativity.
		Relativity and FTL Travel: (FTL stands for "faster than light") This is an FAQ from a usenet newsgroup, which contains an introduction to relativity, as well as stuff on FTL itself.
		History Topics: This has a history of relativity with lots of name-dropping.
	webs.morningside.edu /slaven/Physics/relativity/index.html (541 words)

	Physics - Relativity
		Special Relativity - Introduction - An Alternative Introduction into Special Relativity As special, as general relativity have a nimbus of being far away from common sense.
		Relativity - is the term for Einstein's theory, based on the idea that the laws of science should be the same for all freely moving observers, regardless of their speed.
		An introduction to differential geometry, the geometry of special relativity, and the geometry of general relativity in empty..
	www.geocities.com /Athens/Column/2224/Relativity.html (3687 words)

	Theory of Relativity, Part 1: Special Relativity - Numericana
		The velocity of object B relative to object A is the velocity of B measured in the frame of reference where A has zero speed.
		Such an extension exists, except in the very special case of two photons moving in exactly the same direction, where the notion of "relative speed" breaks down completely (as shown in the above discussion of the relativistic formula for the "addition" of parallel velocities).
		is nonzero and it turns out that the relative velocity of two objects chasing the two photons (at sub-c speed) approaches a definite limit when the velocities of the chasers both approach the velocities of their respective chasees.
	home.att.net /~numericana/answer/relativity.htm (4330 words)

	FAQ - Collapse of Special Relativity
		The book describes the history of Special Relativity in its original assumptions, documents and ideas which led to the acceptance of the theory.
		Further, E=mc2 is the end result of Special Relativity not the central focus.
		He will show you in no uncertain terms what happened that led to the acceptance of Special Relativity and E=mc2 and why they are both in error.
	www.relativitycollapse.com /faq.html (441 words)

	Relativity
		What is immediately evident is how deeply involved with special relativity he was and even Keswani was prompted to say that, As far back as 1895, Poincare, the innovator, had conjectured that it is impossible to detect absolute motion.
		In 1900, he introduced the principle of relative motion which he later called by the equivalent terms The law of relativity and The principle of relativity in his book Science and Hypothesis published in 1902.
		You would tend to think that due to the fact that Einsteins special theory of relativity was known in some circles as the relativity theory of Poincare and Lorentz, that Poincare and Lorentz might have had something to do with its creation.
	einstein52.tripod.com /alberteinsteinprophetorplagiarist/id6.html (1951 words)

	On the Electrodynamics of Moving Bodies
		The observable phenomenon here depends only on the relative motion of the conductor and the magnet, whereas the customary view draws a sharp distinction between the two cases in which either the one or the other of these bodies is in motion.
		In accordance with the principle of relativity the length to be discovered by the operation (a)--we will call it ``the length of the rod in the moving system''--must be equal to the length l of the stationary rod.
		By the principle of relativity this electric charge is also of the magnitude ``one'' when measured in the moving system.
	www.fourmilab.ch /etexts/einstein/specrel/www (6419 words)

	Physics - Space : Special Relativity and the Understanding of Space and Time
		A gentle illustrated introduction to the basic concepts of special and general relativity, which is aimed nonetheless at first year university students is the course SpaceTime 101, by a lecturer at Cal Tech, USA: http://www.theory.caltech.edu/people/patricia/st101.html.
		A discussion of the relativity of simultaneity can be found in Chapter, IX of Einstein's Relativity: The Special and the General Theory, a Popular Exposition.
		Although it is generally overlooked as the consequence of special relativistic effects, the magnetic field around a current-carrying conductor is in fact a strictly relativistic effect arising from the drift of electric charges in the conductor, as viewed by the external observer.
	science.uniserve.edu.au /school/curric/stage6/phys/space/relativ.html (1323 words)

	A brief history of relativity - December 31, 1999
		The new theory of curved space-time was called general relativity to distinguish it from the original theory without gravity, which was now known as special relativity.
		General relativity also predicts that time comes to a stop inside fl holes, regions of space-time that are so warped that light cannot escape them.
		The reason general relativity broke down at the Big Bang was that it was not compatible with quantum theory, the other great conceptual revolution of the early 20th century.
	www.cnn.com /ALLPOLITICS/time/1999/12/27/relativity.html (2825 words)

	Special Relativity: Physics
		As in the last problem—as in any relativity problem—we have the measurable facts (which we must agree on) and the explanation (which we might totally disagree on).
		The rest of relativity is a lot like those last two thought experiments, usually done with enough math to rigorously prove the results that I "hand-waved" my way through.
		Ahmed Khaled read my relativity paper (the one you just finished) and had a tremendous number of valuable thoughts and insights, some of which he put on his own Web page.
	www.ncsu.edu /felder-public/kenny/papers/relativity.html (4291 words)

	Special Relativity (Site not responding. Last check: 2007-10-13)
		The Principle of Relativity (in the restricted sense),
		Relativity, The Special and General Theory by Einstein,
		An introduction to the theory of relativity and Poincaré Symmetry,
	sky.net.co /physics/relatividad.html (65 words)

	Special Relativity
		This then is the entire content of the Theory of Special Relativity: the Laws of Physics are the same in any inertial frame, and, in particular, any measurement of the speed of light in any inertial frame will always give 186,300 miles per second.
		She is also equipped with a couple of photocells, placed a known distance apart on the bottom of her spaceship as shown, and she is able to measure the speed of the same blip of light, relative to her frame of reference (the spaceship).
		That is the unavoidable consequence of the Theory of Relativity.
	galileoandeinstein.physics.virginia.edu /lectures/spec_rel.html (1675 words)

	Centennial of the Einstein Papers: 1905-2005
		The Michelson-Morley experiment, the postulates of special relativity, Lorentz transformations, the twin paradox, energy is equivalent to mass, special relativity as a tool, history of special relativity (a timeline).
		The movies and other information primarily deal with special relativity, general relativity (here and here), and fl holes (a sequence of five pages; scroll to the bottom of each page and click "Forward to...").
		Visuals Pertaining to Special Relativity (from the University of Colorado, Boulder).
	mclibrary.nhmccd.edu /einstein.htm (3547 words)

	General Relativity in the Global Positioning System & NTS-2 GPS Flying Clocks
		This rate is determined to sufficient accuracy, relative to clocks at infinity, by three effects: time dilation due to earth's spin, and frequency shifts due to the monopole and quadrupole potentials of earth.
		At present one cannot easily perform tests of relativity with the system because the SV clocks are actively steered to be within 1 microsecond of Universal Coordinated Time (USNO).
		A frequency history of NTS-2 since launch is presented by Figure 27, a split logarithmic scale is used so that positive and negative values of frequency offset with respect to UTC (USNO) may be included over a large range.
	www.leapsecond.com /history/Ashby-Relativity.htm (1824 words)

	Einstein \| American Museum of Natural History
		In 1912, he was asked to contribute several chapters on relativity to a book.
		The draft focuses on the Special Theory of Relativity, which applies to the "special" circumstance in which observers making measurements do not change speed, or accelerate.
		In this draft, however, the equation, which demonstrates that mass is a form of energy, appears in a somewhat different form.
	www.amnh.org /exhibitions/einstein/energy/special.php (560 words)

	Physics Today September 2004- Books: Physics and Philosophy Meet Practical Engineering
		Students often are introduced to the revolutionary nature of time in special relativity via Albert Einstein's famous thought experiment: Suppose that lightning strikes the front and back ends of a train in such a way that an observer on the station platform determines the strikes to occur simultaneously.
		That insight was key to the discovery of special relativity.
		Surely Einstein's deep conviction that the principle of relativity must be fundamentally embedded in the laws of physics—and his willingness to give up on the ether or anything else that did not accord with that view—was crucial to the discovery of special relativity and cannot be explained as merely a byproduct of a critical opalescence.
	www.physicstoday.org /vol-57/iss-9/p57.html (805 words)

	General Relativity & Black Holes
		The General Theory of Relativity is an expansion of the Special Theory to include gravity as a property of space.
		The Special Theory demonstrated that timekeepers in motion with respect for each other will measure different times for events in each others reference frames: a timekeeper "at rest" will find that an event occurring in a rapidly moving reference frame will take a longer time than a timekeeper moving along with the event.
		In General Relativity gravity is viewed as a curvature of Spacetime so Gravitational Waves are ripples in the fabric of space and time itself.
	cassfos02.ucsd.edu /public/tutorial/GR.html (3331 words)

	The Math Forum - Math Library - Relatvty/Grav. Theory
		Linked essay describing the history of general relativity from Aristotle's notion of the motion of bodies through Lorentz and Einstein in the 20th century, with 29 references (books/articles).
		A short article designed to provide an introduction to relativity and gravitational theory: differential geometry, analysis, and group theory applied to physics on a grand scale or in extreme situations (e.g.
		History; applications and related fields and subfields; textbooks, reference works, and tutorials; software and tables; other web sites with this focus.
	mathforum.org /library/topics/relativity (1284 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)

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