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### Relativity FAQ

Sep10-12 11:09 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: 231 Announcement: End of year contest, $75+$50 prize! Dec18-13 Meta Thread / Thread Starter Last Post Replies Views The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many... Dec31-07 03:06 AM jtbell 0 35,085 Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a... Feb23-13 09:40 AM ZapperZ 1 35,255 I have moved question to quantum physics section. Sep16-04 09:04 AM Rothiemurchus 0 1,420 E=mc2, so we can get energy from matter. However, is there any known way, theoreticall or otherwise, to convert energy... Sep17-04 05:02 PM mathman 3 1,157 According to Einstein's theory, during the process of fusiom some of the mass of the element(s) gets converted to... Sep17-04 05:08 PM mathman 6 1,166 J. W. Moffat has been developing NGT for about 25 years as a modification of General Relativity. He is able to... Sep18-04 04:51 PM mathman 0 918 I am relatively new to relativity (pardon the pun)and have found this a fascinating forum. I am trying to come to... Sep20-04 09:29 AM selfAdjoint 35 2,897 2 particles with mass M and Kinetic Engergy T moving toward each other. what is the kinetic energy T' as it measured... Sep20-04 07:21 PM ori 2 1,237 I'm trying to get a grasp on how to figure out the area of a circle drawn on a sphere. It's just geometry, but I... Sep22-04 11:42 PM chroot 1 9,545 Gravity probe B is designed to detect the distortion of space (both the linear compression and lateral shear of the... Sep23-04 01:49 PM pervect 1 1,172 Correct me if i am wrong but..... I remember quite some time ago reading an article about scientists sending... Sep23-04 04:27 PM Nereid 11 1,072 This recent paper describes the socalled Soccerball problem in quantizing relativity. Franz Hinterleitner... Sep23-04 05:48 PM marcus 2 2,499 That's what Wikipedia said. If, for an outside observer, it takes an infinite amount of time for matter to enter a... Sep23-04 08:48 PM selfAdjoint 1 1,505 Whether they have been detected or not (someone might want to update on this, LIGO etc.?), it seems undeniable that... Sep25-04 02:37 AM Garth 4 1,258 The Peripatetic Albert, Round 3 ( 1 2 3 ... Last) ...And so, I was driving north from McPherson toward Salina, explaining Special Relativity to my wife and oldest... Sep26-04 03:22 PM geometer 88 4,476 As a neutron star collapses further and neutron degeneracy pressure causes neutrons to increase in mass (by virtue... Sep26-04 05:02 PM pmb_phy 15 1,788 Can a Volume of Space be detected without Particles? I am new so please explain this with kid-gloves, you may wish... Sep27-04 07:19 AM Wave's_Hand_Particle 0 772 Heres what i dont understand, a massive body in space causes the space around it to warp in accordance with its shape,... Sep27-04 02:38 PM pervect 9 6,540 Hi friends! Can we understand what he meant about his theory? Or did he want to tell us such different things? Sep27-04 05:55 PM ostren 18 2,513 Time Dilation & big bang Question ( 1 2 3 ... Last) With respect to time dilation... During the Big Bang, when space was expanding explosively (probably at light... Sep27-04 06:59 PM Garth 93 9,283 One of my hw problems for GR says: "Explain why a uniform external gravitiational field cannot raise tides on the... Sep27-04 07:41 PM Garth 5 1,944 As you go back in time,the gravitating bodies come closer and closer.So the gravitational field gets more and more... Sep29-04 11:55 AM Garth 20 1,620 Can anyone give me a quick overview of relativity, general relativity and special relativity? What does general and... Sep29-04 04:07 PM blue_sky 6 1,022 Actually, this is one of the question I was wondering about. If mathematics allows for wormholes (And there's really... Sep29-04 04:32 PM pervect 7 876 If an object were undergoing acceleration in hypothetical flat space, then a distant clock's tick rate (relative to... Sep30-04 03:19 PM pervect 7 1,782 The Principle of Relativity, (PR) may be summarised as the doctrine of no preferred frames of reference. It not only... Oct1-04 03:25 AM Garth 12 2,017 Okay, I need to get something straight. In Einstein's theory of Special Relativity, as you approach the speed of... Oct2-04 09:22 PM pervect 8 2,276 Hi there! I'm not sure about the dictation of the names!!! But can anyone explain the method of their experiment on... Oct6-04 06:57 AM robphy 1 982 einstein's theory of relativity sets limits on speed, saying it cannot be greater than c, the speed of light. What... Oct7-04 10:35 AM selfAdjoint 1 3,847 Hi all, It's said that approximately 3 seconds after/into the Big Bang, the 'universe' expanded at a velocity > c.... Oct7-04 10:47 AM singleton 10 2,108 In a black hole, since light cannot escape are the photons slowed down or changed in direction? Oct7-04 10:53 AM PatPwnt 14 1,280 I've got my asbestos suit on, boys and girls. :surprised: I was searching for links to Einstein's 1912 paper where... Oct10-04 09:14 AM selfAdjoint 17 1,997 I'm trying to understand the mechanics of time dilation. Mabye some of the SR/GR Gurus can help me with this one... Oct10-04 03:17 PM ostren 5 1,125 I have learned that objects moving at high velocity experience time dilation, among other things, and that there is no... Oct10-04 09:37 PM rcgldr 5 1,770 SR Paradox ( 1 2 3 ... Last) Hi all, I know that this isn't a "flaw" in SR. So, I'm not here claiming to have found an amazing flaw in SR. lol. I... Oct11-04 06:45 PM chroot 77 5,550 Which, if any, of Einsteins models and theories have been replaced by more advanced or precise ones? The only thing... Oct11-04 11:16 PM Taoist 3 1,695 I read in a book that relativity and newtonian physics dont work with each other or something like that. Like when... Oct12-04 10:15 PM Mike2 6 4,705 A mother and her son share the same birthday. Then say a mother is 24 years old when her son was born. Then when she... Oct13-04 03:59 AM Fredrik 2 1,841 So.. let me think :grumpy: the word "motion" is no good; it isn't found in any treatise about Relativity or in any... Oct13-04 09:13 AM russ_watters 1 882 what would change in everyday life if the speed of light were to decrease? Oct13-04 10:00 AM Mike2 22 2,153 Hi everyone! I have learned the general relativity, but I have a few problems which I don't understand. Can someone... Oct14-04 05:55 AM Garth 6 3,288 To have a connection in GR one imposes several conditions. Among others, one condition is that the connection shall be... Oct14-04 06:46 AM hellfire 3 2,641