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Mar11-14 10:20 AM bcrowell 

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Special & General Relativity

- Dependence of various physical phenomena on relative motion of the observer and the observed objects. Exp. & theo. theories of relativity
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Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Feb23-13 08:40 AM
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The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many...
Dec31-07 02:06 AM
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Gents, What programs are most successfull for visualization physical processess?
May12-05 04:27 AM
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Very interesting... General Relativity redefined?
Mar5-08 04:59 PM
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What is the divergence and curl at the edge of a black hole?
Jul26-09 04:00 AM
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I recently started self-learning special relativity. I am having lots of trouble convincing myself about the Lorentz...
Jul29-11 01:34 PM
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Arguably, this is pure mathematical question, but most discussions of semi-riemannian manifolds are in the context of...
Sep15-11 05:49 PM
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What would happen if Theory of relativity is abolished or challeged? As the news is coming that Neutrino is supposed...
Oct4-11 11:32 AM
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Are time and space independent of an object, or are they properties of an object?
Jun18-09 01:07 PM
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Hey everyone, I am new on this forum and don't really know how things work here, but I'll try my best. I am a junior...
Oct2-10 12:13 PM
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Hi, I can't say I've really ever done much relativity but this made me wonder. Imagine we have some frame...
Nov19-10 11:58 AM
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Thus wrote PAM Dirac in his little monograph, "General Theory of Relativity", p.34t. More fully, "Even a light signal...
Feb6-11 06:48 PM
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Point particles have mass. Point particles are dimensionless. Would it stand to reason that point particles are...
Apr13-11 12:10 AM
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I know that it is observed that galaxies and stars thousands and millions of light years away are expanding away from...
Nov28-12 04:46 PM
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I just read in a article that NASA has revisited an older theory and found they can improve on it greatly. here is a...
Jan25-13 11:21 PM
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The speed of light is constant but with reference to what? Distances are not absolute and neither is time. Is it...
Oct14-09 01:13 PM
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A person is in a confined cubicle - say 1m x 1m x 1m. Assuming he is not accelerating, he should not be able to tell...
Dec12-09 05:00 AM
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In the mass-energy equivalent equation, E=mc^2, why is it related to the speed of light?
Dec25-09 01:27 PM
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Let's suppose that I am the Captain at a space dock sitting in interstellar space. My crew decides to go on a trip in...
Dec31-09 05:56 AM
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Hi, I'm rather confused about the procedure in which people obtain gravity from gauged (super)-Poincare algebras....
Jun30-10 02:25 AM
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I'm amazed at how often the question arises, and how many people are interested in "faster-than-light" travel. So in...
Oct21-10 12:26 AM
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I was working on a problem the other day involving the Tensor versions of the Einstein Field Equations where I defined...
Mar1-12 08:30 AM
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I'm reading Spacetime and Geometry: An Introduction to General Relativity by Sean M. Carrol and in the chapter on...
Jan24-13 10:43 PM
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Calculating gravity with high precision ? Few questions / concepts im trying to get clarified....adding all the...
Nov25-13 12:13 PM
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I understand the ideas behind relativity (4d space time, different speeds see different slices of it, what not), but...
Oct31-04 12:01 PM
3 925
I'm reading Einstein's book on relativity (aptly named Relativity), and trying to follow his "simple" derivation of...
Nov9-10 03:19 PM
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Find the coefficients in coordinate bases, of the metric tensors for Minkowski space, for "rotating coordinates"...
Apr8-11 06:06 PM
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Sorry if I am asking a too trivial question! I am having a confusion regarding the following-The solution to Einstein...
Oct31-12 03:34 PM
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When the 'evaporation' of a black hole supposedly occurs, it is always attributed to 'Hawking radiation.' As I...
Feb4-13 05:56 PM
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Gravity seems to squish space time, velocity seems to also. It seems that through each's affect on distance, a...
Aug6-09 09:06 AM
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This may have been hashed before, so forgive my indulgence if this post is a logical fallacy. Energy = Mass, OK ...
Feb5-10 11:26 PM
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Hi all, I've heard it said that if I could send a message faster than light, then another inertial observer would...
Nov22-11 11:18 PM
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Hi, I am currently struggling with an exercise in Sean Caroll's Spacetime and geometry. The question is "Can we make...
Dec23-11 09:54 AM
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Hey guys The lab manual for the class is found here ...
May22-13 03:26 PM
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While explaining how science works in my biology class my biology teacher said that relativity had been proved wrong,...
Dec19-12 03:19 PM
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Dear all, This is a continuation of my previous thread, but I figure it's cleaner to start afresh with this topic....
Apr7-13 10:45 AM
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Hi. BHs receive gravity of other stars and then move. Does this mean that information of gravity of other stars go...
Sep10-12 07:31 AM
sweet springs
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It seems that the common approach to obtain the equations for the Lorentz transformations is to guess at its form and...
Mar14-10 12:04 PM
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in my book i think that on any planet if we can stay for 1 year then on earth how much time are gone
Jun16-11 10:36 AM
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The ship leaves the station carrying two mirror clocks. One aligned with the motion. The other, orthogonal to the...
Feb15-12 05:06 PM
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Hello guys , beside Einstein's General Theory of Relativity by hervik , is there any lecture or book about this case ?...
Nov13-12 02:44 AM
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So Newton says that gravity is an attractive force and some people believe in gravitons to transmit that attractive...
Feb21-13 02:04 PM
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