# Sub-Forums : Special & General Relativity

Search this Forum

### Relativity FAQ

Y 10:20 AM bcrowell

# Special & General Relativity

- Dependence of various physical phenomena on relative motion of the observer and the observed objects. Exp. & theo. theories of relativity
 Views: 8,743 Announcement: Two free ways to get Gold Membership! Jan17-12 Meta Thread / Thread Starter Last Post Replies Views Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a... Feb23-13 08:40 AM ZapperZ 1 36,711 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 36,567 Consider the thought experiment in the diagram below. ... Feb12-14 05:27 PM WannabeNewton 12 627 Have been reading the "Impossibility of exceeding c" notes in the Lorentz Transformation physics forum page: ... Feb12-14 10:14 AM DaleSpam 6 413 I want to study GR from a mathematical point of view but I know almost no physics. Is this possible? And what textbook... Feb11-14 11:56 PM bcrowell 6 430 Hi guys, this is my first post, I'm a newbie regarding physics and relativity so I hope you can help me here. I've... Feb11-14 12:44 PM PhoebeLasa 8 420 Does anyone here know a source, where the equation of motion for a massless charged particle (which of course does not... Feb11-14 10:28 AM bcrowell 20 712 Hello! I am interested in knowing the existing relation between the ADM Formalism and the Wheeler-deWitt Equation. ... Feb11-14 10:16 AM jesusrods 0 204 Hello! I am currently learning the theory of relativity, but have a hard time understanding the time dilation... Feb11-14 10:15 AM Nugatory 17 920 Hi, I’m a bit confused. I am familiar with the chain rule: if y=f(g(t,x),h(t,x)) then dy/dt=dy/dg*dg/dt+dy/dh*dh/dt... Feb11-14 08:47 AM Chestermiller 4 403 Hello, I am learning General Relativity through some books like 'Gravity' by Hartle and through some other text... Feb10-14 04:58 PM Daverz 6 359 Hiya, I am a grad student who has had a couple semesters of GR. I am currently perusing a book about Two Spinors in... Feb10-14 02:34 PM dozappp 0 211 I thought that one of the features of GRT was to allow for ACCELERATING reference frames. Yet none of my textbooks... Feb10-14 11:38 AM DaleSpam 15 708 There are only two frame moving relative with each other at certain velocity. One frame see the other going right and... Feb10-14 09:22 AM Nugatory 1 278 The popular thought experiment states, that if of two identical twins one is left on earth an the other is embarked on... Feb10-14 09:14 AM scienalc 2 320 Hi, I decided to learn about relativity with this book, and I'm looking for people who would like to read it with... Feb9-14 05:19 PM strangerep 3 445 page 71 he appears to define the affine connection in terms of derivatives on the locally inertial coordinates with... Feb9-14 04:39 PM thoughtgaze 9 325 I had a quick question about Time Dilation and Length Contraction. Are the two just different ways of... Feb9-14 01:41 PM phyti 14 435 From what I understand, Hawking radiation results when one virtual particle (of the pair) falls into the black hole... Feb9-14 12:17 PM PeterDonis 1 271 I am trying to derive the geodesic equation by extremising the integral $$\ell = \int d\tau$$ Now after applying... Feb9-14 11:47 AM Nabigh R 3 293 I have a question regarding world lines and Minkowski diagrams. I have been looking everywhere for an answer and can't... Feb9-14 02:27 AM ghwellsjr 2 284 There are various explanations for Thomas precession in the literature and I would like to come to a deeper... Feb8-14 04:43 PM WannabeNewton 69 2,491 Thanks for the answers on my previous thread, it made some sense, and if I'll reply if there's further misconception.... Feb8-14 03:12 PM phyti 42 1,394 Hi, I'm just beginning to learn relativity, but I have a question about why gravity is so different from other... Feb7-14 08:08 PM WannabeNewton 4 429 hi everyone. i'm having trouble understanding the concept of proper time in general relativity. suppose we have... Feb7-14 06:04 PM pervect 31 783 I have a pretty basic question - one that should have occurred to me long ago, but I never really thought about... Feb7-14 03:12 PM A.T. 11 388 I'm not sure if this is the right forum. I'm sorry, but I'm not good at Physics or English (which is not my first... Feb7-14 01:02 PM waitedavid137 8 370 Hello! This is regarding problem 10.4 in Wald. Let ##(M,g_{ab})## be a space-time, ##\Sigma_{t}## be a one parameter... Feb7-14 09:25 AM WannabeNewton 7 698 We know the equations for speed of rotating magnetic field, as N= 120*f/P, where f is frequency of AC currents & P is... Feb7-14 07:16 AM Bill_K 1 364 The velocity of an object can, theoretically, only be measured relative to the velocity of another object. If I... Feb6-14 01:45 PM Glurth 9 338 Let's say we have a mass with an object orbitting with constant speed in a circular orbit and a distant observer Bob.... Feb5-14 08:12 PM PeterDonis 37 985 In classical mechanics we talk about homogeneous and inhomogeneous gravitational fields. Do we do this with... Feb5-14 09:35 AM DaleSpam 1 223 There is a connection between the origin and the points in the light cone.That is to say,there is a casual... Feb5-14 12:17 AM bcrowell 13 544 In flat spacetime, there exists a natural connection that allows you to compare two vectors at different events. Now,... Feb4-14 05:33 PM dextercioby 23 742 EDIT dw i figured it out, not sure how to remove it though! Feb4-14 03:28 PM tommyj 4 416 Lets say I fall into a super-massive black hole's event horizon. Facing outwards towards the event horizon (with the... Feb4-14 12:03 AM Glurth 15 486 Hi, I'm doing the master in science and one of things that I have to study is the Gödel metric. His paper have a high... Feb3-14 08:56 PM George Jones 2 315 Imagine a 2.3 Ly long box. At the middle of the box there's a half silvered mirror (S) which splits laser beam into... Feb3-14 01:55 PM Vanadium 50 10 507 Hello all, After a brief break from attempting to learn tensor calculus, I'm once again back at it. Today, I... Feb3-14 12:46 PM Nugatory 12 537 For a long time I had basically taken for granted the usual interpretation of one-parameter families of orthogonal... Feb3-14 12:43 AM WannabeNewton 4 506 I am writing a paper about SR and GR. I have the following: Special relativity deals with inertial reference... Feb2-14 06:03 PM PAllen 27 963 As per Maxwell's equations the speed of light is c = 1/√(permeability X permittivity) I find that both... Feb2-14 04:51 PM pervect 12 502