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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
1 37,364
The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many...
Dec31-07 02:06 AM
0 37,126
I've completed college-level special relativity, which includes length contraction, time dilation, the Lorentz...
Oct6-11 04:09 AM
8 2,445
I have a question, but I'm a neophyte so please correct my premise if it is wrong. If it is true that in an expanding...
Oct5-11 08:58 PM
1 1,163
Generalizing somewhat on my other post, I have to wonder -- if everything observable has an energy associated with it,...
Oct5-11 07:14 PM
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On page 29 equations 2.1.20 and 2.1.21 of Gravitation and Cosmology by S. Weinberg he gives these expresions for...
Oct5-11 06:06 PM
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The formulas of Special Relativity do not always tell what things really would look like for our eyes when they travel...
Oct5-11 06:04 PM
5 1,382
And if so, How? From the post 15 and 16 of the thread ...
Oct5-11 04:04 PM
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I perfectly understand the concept of the experiment, but a small doubt is haunting me. For example, if I run on...
Oct5-11 03:30 PM
9 1,830
I have a project this year called "Is gravity a gauge theory?". From my understanding, it is. But I was wondering if...
Oct5-11 12:45 AM
3 779
I've been working on a Special Relativity simulation/game, and I'm interested in getting some feedback. Basically,...
Oct4-11 08:42 PM
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I want to know that if we are standing on the earth's equator facing west and throw a beam of light at some distance, ...
Oct4-11 05:04 PM
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Ok I am only a physics undergrad so if this is obvious im sorry. I understand the concepts of SR pretty well but one...
Oct4-11 04:51 PM
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I have read this millions of time on internet that laser spot can move faster than light. but i can't understand how....
Oct4-11 03:02 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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hey forum, first of all, i'm a high school kid so forgive me if this is stupid. i've been thinking about...
Oct4-11 09:19 AM
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Assume a stick of length 15*3*10^8 metre. One end points towards me, at the other end we place a ball very near to...
Oct4-11 08:55 AM
3 1,160
Please correct me if I have made a mistake, but as I know, being closer to large masses will slow the time for you....
Oct4-11 07:17 AM
8 1,610
I've always thought that Einstein's theory of general relativity was quite beautiful, it explained gravity as merely...
Oct3-11 09:13 PM
3 1,075
I really can't understand how faster than light travel creates the cause and effect paradox. I have spent many days...
Oct3-11 08:42 PM
6 1,861
Relative some arbitrary point in Earth’s orbit around the Sun, does Earth experience varying degrees of time dilation...
Oct3-11 08:29 PM
4 1,889
Event 1 x1=x0 t1=x0/c Event 2 x2=2x0 t2=x0/2c I'm trying to find the velocity of s' frame where these events...
Oct3-11 07:48 PM
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There has been so much interest lately in objects going faster than the speed of light, I though I would propose a...
Oct3-11 02:11 PM
40 4,156
Well...i have found the laws and theories related to relativity quite disturbing...few laws like the newton's stating...
Oct3-11 01:05 PM
3 1,275
For a time-like interval between 2 events, it is impossible to find an inertial reference frame in which the events...
Oct3-11 12:57 PM
5 1,710
My first question, so sorry if it's in the wrong forum. I'm trying to understand the Newtonian weak field...
Oct3-11 12:26 PM
5 1,460
I'm a lay person who is interested in developing a better understanding of science in general, as well as specific...
Oct3-11 02:09 AM
65 5,568
The main, or one of the main, arguments I hear about neutrinos flying faster than light is that it would violate...
Oct2-11 09:13 PM
11 2,791
Hey, does anyone know where I can find the correct metric for a rotating disk? Is the article at this link correct? ...
Oct2-11 05:33 PM
Doc Al
11 1,928
Hi all, I've been reading some general relativity in my spare time (using Hartle). I'm a bit confused about...
Oct2-11 11:52 AM
7 2,014
I was reading "Reinventing Gravity - A Physicist Goes Beyond Einstein" by Mr. John Moffat, btw it's a really good book...
Oct2-11 08:39 AM
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Here is a simple one. An observer far away from a black hole emits a light pulse every second. A second observer has...
Oct2-11 02:17 AM
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I am trying to formulate an integral representing Tau between two r-values for radial motion in the Schwarzschild...
Oct1-11 04:03 PM
3 1,084
So, energy equals mass times the speed of light squared. Energy can determine speed, because the energy is...
Oct1-11 11:47 AM
1 813
Hi I'm new and an idiot so please don't burn me, I wouldn't have come to a specialist forum if I could have found the...
Oct1-11 06:34 AM
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I am a beginner in this field. I have read Special theory of relativity by Einstein, but the one written for...
Sep30-11 04:38 PM
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I was talking with my friend and the best answer i could come up with is "It does." But, i could not explain why....
Sep30-11 11:50 AM
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A blue guy and a red guy are moving at the same speed in opposite directions with respect to some rest system as...
Sep29-11 07:36 PM
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Alright I've asked before but this is still bugging me. given that the mass energy equation is this ...
Sep29-11 02:13 PM
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How do Maxwell's equations predict that the speed of light is constant? I found different answers and some people even...
Sep29-11 11:21 AM
11 6,017
Having trouble trying to wrap my mind around how two reference frames (both in motion) can observe a third reference...
Sep29-11 10:20 AM
M. Bachmeier
0 629
For the universe to be totally flat, and not just asymptotically closer to being flat as the universe expands,...
Sep29-11 08:44 AM
8 1,739

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