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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 37,501
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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I've just read the FAQ about this and IMO it is "not even wrong" to say that energy conservation doesn't apply to...
Aug8-11 05:40 AM
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Knowing that a photon can not be at rest, I was wondering what would happen supposing if we travel at the same...
Aug7-11 09:30 AM
6 1,504
hello, lets say the there are two bodies that are moving at the same speed of 50% of the light speed and they both...
Aug7-11 08:17 AM
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SR leans more toward direct observation rather than explanation, which is fine, mostly resulting from experiments with...
Aug6-11 10:43 PM
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In Schutz book, A First course in GR page.11 eq. 1.2 ...
Aug6-11 03:43 PM
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I remember reading an article that said essentially that the point of reference and the number of "space structures"...
Aug6-11 10:57 AM
9 1,334
what would Rabcd;e look like in terms of it's christoffels? or Rab;c
Aug6-11 06:26 AM
11 2,668
When the an object is accelerated and when the velocity approaches the speed of light, its mass increases...
Aug5-11 03:37 PM
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In a previous thread someone pointed me to DH's FAQ article on the Rest Frame of a Photon. In the article DH states,...
Aug5-11 11:40 AM
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This is something that has always bugged me about relativity... I must be missing something.... Lets say you have a...
Aug5-11 08:05 AM
Doc Al
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General relativity states that our universe is four dimensional curved space so time dimension is not separated from...
Aug5-11 05:12 AM
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I’ve been looking at the Wikipedia article on affine connections with a view to better understanding the choice of...
Aug5-11 02:06 AM
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Pair-production is the event when a particle and anti-particle is created from a single photon. We don't see 2 or more...
Aug5-11 12:20 AM
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Hi, I just started reading "The Elegant Universe" as an introduction to physics. Up to this point I thought I...
Aug4-11 10:10 PM
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If photons emit gravitons, then where does this energy come from? It cant pull it from its kinetic energy or maybe it...
Aug4-11 09:14 PM
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Most of what I've learned about Special Relativity is self taught using Google and Wikipedia because I'm still in high...
Aug4-11 11:41 AM
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We all realize time dilates in a gravitational potential. Is there any evidence to suggest there is time dilation in...
Aug4-11 11:19 AM
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moving Moving at c ( 1 2 3 ... Last)
I'm a relative newbie to relativity (no pun intended -- I know you've heard that one too many times), as well as to...
Aug4-11 10:18 AM
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I'm trying to use the equations on this page and I have solved the following. Is it correct? ...
Aug4-11 03:54 AM
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In order to explain the relativistic nature of magnetism, a book shows an example of linear procession of charges:...
Aug4-11 01:38 AM
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On my blog, I am having a continuing discussion on special relativity with another person (we are both amatuers). We...
Aug3-11 09:38 PM
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Can frame dragging around a black hole induce closed timelike curves (CTC)?
Aug3-11 07:56 PM
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can twin paradox be solved,if no, what r the difficulties scientist face to solve it?? or is there a solution on it.
Aug3-11 01:17 PM
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Who’s “spin” is in the Einstein-Cartan theory? Source’s spin or the test particle’s spin? I quantum mechanics, when...
Aug3-11 12:21 PM
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I have been trying to figure this one out for some time now. I have read much on the subject, but it seems to be dealt...
Aug2-11 10:20 PM
163 34,808
can you construct (or if yes, is it regularly done) a Hamiltonian in curved spacetime? If you took a system and moved...
Aug2-11 06:06 PM
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when we move with light our time is slower and when we move against it then it's slower but what if we move at 99%C in...
Aug2-11 04:11 PM
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If maths tells us 1 * -1 = -1 and it takes a positive cell to repel a positive cell ..... could in theory a...
Aug2-11 11:36 AM
Vanadium 50
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I do not understand if you accelerate a hydrogen atom to 90% the speed of light its mass is greatly increased. Are...
Aug2-11 11:03 AM
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I understand that matter and energy bend space time, yet i am curious as to the level at which it requires to bend it....
Aug2-11 10:57 AM
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1) Is it always a given that the spacetime curvature will be flat in a region in which there is no mass? 2)...
Aug2-11 10:25 AM
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a situation of twin paradox one twin alice is moving with 99%C another john is at rest on earth this means 1...
Aug2-11 09:18 AM
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I was reading something about the Cartan (vierbein) formalism in GR, in wich the connection is allowed to have...
Aug2-11 09:03 AM
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If a bacteria was travelling through space at the speed of light would the cells divide at a constant or relative...
Aug1-11 11:20 PM
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how is twin paradox resolved in case of no/zero acceleration/deceleration? two twins one on earth and other on a...
Aug1-11 01:20 PM
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There is no clock that will measure time independently of movement. And conversely, nothing ever happens that does not...
Aug1-11 10:52 AM
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I didn't know where to post this, but I figured since it has the word "relativity" in my question I would stick it...
Aug1-11 01:49 AM
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Let us consider the cosmological metric: {ds}^{2}{=}{dt}^{2}{-}{}^{2}{} -------------- (1) For closed models k is...
Aug1-11 01:20 AM
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In Newtonian physics, the center-of-mass of a group of particles depends on the instantaneous positions of the...
Jul31-11 02:47 PM
4 1,132
Relativistic momentum is a vector, just as non-relativistic momentum is a vector, right? Part of the relativistic...
Jul31-11 02:47 PM
7 3,912

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