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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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Feb23-13 08:40 AM
ZapperZ
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
jtbell
0 37,235
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
TrickyDicky
59 5,132
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
ghwellsjr
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
HallsofIvy
5 1,387
SR leans more toward direct observation rather than explanation, which is fine, mostly resulting from experiments with...
Aug6-11 10:43 PM
GrayGhost
12 1,409
In Schutz book, A First course in GR page.11 eq. 1.2 ...
Aug6-11 03:43 PM
TrifidBlue
6 1,086
I remember reading an article that said essentially that the point of reference and the number of "space structures"...
Aug6-11 10:57 AM
NBagley119
9 1,334
what would Rabcd;e look like in terms of it's christoffels? or Rab;c
Aug6-11 06:26 AM
dextercioby
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
DrGreg
5 974
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
rede96
60 4,346
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
4 1,120
General relativity states that our universe is four dimensional curved space so time dimension is not separated from...
Aug5-11 05:12 AM
harrylin
45 6,801
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
Goldbeetle
8 1,477
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
kannank
17 1,979
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
DaveC426913
5 934
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
cragar
16 3,438
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
Fredrik
4 1,633
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
H_A_Landman
23 4,950
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
PAllen
58 3,736
I'm trying to use the equations on this page and I have solved the following. Is it correct? ...
Aug4-11 03:54 AM
randombill
1 1,594
In order to explain the relativistic nature of magnetism, a book shows an example of linear procession of charges:...
Aug4-11 01:38 AM
cragar
1 1,225
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
DaleSpam
83 6,636
Can frame dragging around a black hole induce closed timelike curves (CTC)?
Aug3-11 07:56 PM
Chalnoth
9 1,740
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
pervect
2 939
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
tom.stoer
3 1,228
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
ccm.student
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
dextercioby
2 786
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
harrylin
94 9,059
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
11 1,356
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
DaveC426913
8 1,870
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
rationalist76
3 1,694
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
Bill_K
4 1,201
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
ghwellsjr
6 1,038
I was reading something about the Cartan (vierbein) formalism in GR, in wich the connection is allowed to have...
Aug2-11 09:03 AM
dextercioby
3 975
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
rationalist76
3 1,011
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
D H
131 10,118
There is no clock that will measure time independently of movement. And conversely, nothing ever happens that does not...
Aug1-11 10:52 AM
time_nerd
104 8,132
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
ghwellsjr
16 1,797
Let us consider the cosmological metric: {ds}^{2}{=}{dt}^{2}{-}{}^{2}{} -------------- (1) For closed models k is...
Aug1-11 01:20 AM
Anamitra
1 518
In Newtonian physics, the center-of-mass of a group of particles depends on the instantaneous positions of the...
Jul31-11 02:47 PM
DrGreg
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
jaketodd
7 3,912

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