general relativity

Imagine an isolated one, with no spin, and no net electric charge; imagine a super-duper massive one, with an event horizon (EH) 0.1 light-year in radius (yeah, unlikely there are many, if any, in the observable universe). Imagine you are tiny, only 1mm top to tail, and that you have a set of...

This article is a computational analysis of the theory of gravitational waves; as expressed within Einstein’s Theory of General Relativity and the wider realm of Astrophysics. Essentially a critique, this study has been written for the purpose of explaining the unobvious challenges faced in...

In Newton's world, the time taken for light to go 100 meters is 100 divided by the speed of light, c. No if's, no but's. In Einstein's SR (special relativity) world, relative motion, who has what clocks where, etc are important. If we have two observers (A and B), each with an identical clock...

I suggest that in pure empty space, devoid of mass or gravity, that the Flow of Time is infinite. Time stops at the speed of light, it will nearly stop for a mass traveling very close to the speed of light. When a gravitational field strength decreases, time flow increases. It has always been...

Some very spiffy work out of the National Institute of Standards and Technology: Scientists there have measured the special relativistic time dilation of high precision optical clocks at the impressively slow speed of about 20 miles per hour. They have also used the same high precision clocks to...

A lot of people don't seem to like the idea of black holes. Understandable if you happen to run into one, but not if you simply wish to challenge the general validity of the idea. But whether you like the idea or not, it seems only reasonable that one should actually know what a black hole is...

"And the Collapse of Spacetime", by Stephen J. Crothers. Here is the URL to this 9-page PDF: http://www.wbabin.net/science/crothers6.pdf The abstract: It seems to be an attempt to show that General Relativity (GR) contains a fatal internal inconsistency. In terms of its stated scope, what...

I'm no Physicist, and my understanding of the Calculus is shaky in the extreme. However I did read that Albert Einstein justified General Relativity(in part) by the Gedanken experiment of a scientist in a closed windowless room. Supposedly there is no experiment that could distinguish whether...

Hey everyone, I stumbled upon this page that has an interesting theory that seems to extend general relativity to explain inertia and dark matter. I really can't decide if it is woo or not, but it is better than average for several reasons. The authors try to make it: 1. mathematical 2...

Hey, anyone have any opinions on the "Hypatia" theory? See website here: http://quasars.org/hypatia/hypatia.htm And techical paper here: http://arxiv.org/abs/astro-ph/0210052 Apparently, Hypatia is the 5-d sphere that our universe is a part of. Supposedly, this 5-d sphere interpretation...

Consider two identical rocket ships separated by a distance of 1 km. At t=0 the ships are at rest with respect to each other, and are pointed in opposite directions which are perpendicular to their displacement (so if one is at x=0 and the other at x=1, they are pointed in the y and -y...

(I can here the moans from around the world :-) It seems to me that Relativity is claiming that observing the reality of one rest frame, from the reality of another rest frame, creates a new and different reality of the observed reality. To explain what I mean I will use the light clock...

What is this theory? What sort of predictions does it make? I've heard of it before, but I could never find a good explanation. I'm hardly sure what the 'loop' means. What sort of assumptions does this theory make? I get the impression that it's somehow superior to "String Theory" and other...

Hi, all--just a lurker here, but I've been looking for a place to ask a question that's been bugging me for a while, and given that there seem to be a number of physics experts here, it seemed to be an appropriate forum. On to the question, but first I want to mention that it's going to be a...

I don’t understand why, in some Relativity experiments, a clock slowing down is interpreted as being time per se slowing down (time dilation). We use clocks to measure time, but clocks aren’t time. What has a clock slowing down got to do with time slowing down? All clocks are mechanical and...

OK, I've done some quick research and have some results to report. In addition, I've been threatening (heh) to start a conversation with Yllanes and Ben Tilly about physics. So I think I'll make a combination of the two, rather than be a hog and make two threads. Moderators can decide if I was...

Oh, this makes me ill: http://www.einsteinwrong.com

I find it difficult to get answers for questions that deal with abstract scientific concepts that are explained in a way that I, a moron, can understand. Here is my problem: I was driving on the interstate in Atlanta, GA, and the Marta (what they call the mass transit in Atl) going about 75...

You guys probably get a lot of these: sorry if this has been posted before many times. I thought I understood General Relativity, until I read a question posted by RussDill a while ago. Now he has got me confused again... Scenario: A ship is 100 meters long (at rest w.r.t. the barn), and...

http://www.kuro5hin.org/story/2003/6/13/6330/21089 I also reccomend the whole site (www.kuro5hin.org). It is my main page!

This is really directed to Tez, although others are welcome to help as well. I was reading in "Exploring Black Holes" (Wheeler/Taylor) than Einstein's General Relativity equations were not derived, but are written down in similar fashion to Newton's equations. Those equations are not in the...