relativity

HI guys, The question that I was pondering upon is: "If we have two or more observers [ RF's ] at relative v is t=0 for light events simultaneous for both [all] of them?" I was under the impression that t=0 is relative and not absolute, according to SRT but I have reason to believe I am...

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...

This could be the most concise formulation of a central contradiction of modern orthodox physics: Equivalence between mass and energy on the one hand, but energy without mass on the other hand. How is it possible that educated persons accept such a huge inconsistency? See also: uncertainty...

WARNING - written by a layman. As well as time dilation slowing the rate that clocks run and things age etc, wouldn’t it also slow the rate of the very speed that was causing the time dilation? Isn’t time dilation effectively speed dilation? In other words, the faster you go the slower you go...

I'm one of those non-physicist persons who’s quite interested in physics, while still being very non-expert. I've read quite a lot within books and articles that are lay-person-accessible. In the process, I've formulated a question for which I’ve yet to encounter an answer (or even...

In another thread, I asked JEROME DA GNOME to clarify what he believed about the origins of life and the universe. His response was: I replied: He replied: At that point I decided to start a new thread, rather than derail the existing one. I would appreciate it if a moderator could step in if...

For your perusal: General relativity applied to an expanding universe supports two obvious sorts of curvature horizon: cosmological horizons and gravitational horizons. It might be nice if we could topologically transform one into the other, and treat both according to the same basic...

Hi everyone. This is my first post, although I have been reading certain threads every now and then - and even though I am not an active skeptic when it comes to organizations et cetera, I try to follow the skeptic world as closely as I can and would consider myself skeptic by heart. Anyway...

Linkage here This looks like it took a lot of time and thought. I am in no way an expert, but this seems to make sense. Hey physicists, is this an adequate explanation for laypeople?

I was recently re-reading David Bodanis' "E=mc squared". He explained somewhat vaguely how Einstein had discovered the link between matter and energy, and said that if you wanted to know more, you could go to Bodanis' web site and the full rationale for Einstein's conclusions would be explained...

According to this article: http://www.breitbart.com/article.php?id=paLight_Wed_1745_Speed_of_light&show_article=1&cat=0 have claimed to make photons travel faster than the speed of light. At least, that's their theory. There's no data, other than how they came to that conclusion. One quote...

Thanks to a Fark Submitter, I had the opportunity to readthis. He even Godwined his own piece. I am in no way an expert, and I understand that sceince is always evolving. Our understanding of things improves over time, but is this guy saying that E=MC2 is not valid because scientists can...

(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...

I recently read an article written by Steve Bryant "relativity challenge" and wondered what others thought of it...I noticed a lot of hostility towards it...even though, to me it made a lot of sense, by disproving a lot of the trash that SR and GR predicts. I have not included a link as:- I...

I am curious how fast the earth is moving, I am not asking about its rotation around the sun or the rotation on the earth's axis. I am curious if you were to observe the solar system in space at a single point and not affected by gravity or any force and you were to watch the solar system pass...

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...

Those familiar will relativity will know that what we call "now "has no special significance in the physical world...in which scheme of things, all of what we call past, present, and future, are held to exist equally: the world does not evolve in time. Furthermore, we have no physical proof that...

Everyone has heard about SR: Lorentz contraction, time dilation, etc. But not many people have stopped to think what would you actually see (as opposed to what you would measure) if you were travelling at relativistic speeds. The answer is more complex than one would think: you wouldn't see...

Several threads have shown a need for something like this. Introduction: The purpose here is to produce a simple introduction to special relativity in a way that can be understood, with some work, by folk who have only high-school maths and basic Newtonian physics. Given this, there will be...

I was going over Special Relativity in my head the other night, and just as it was starting to make sense to me, I came across a mental conundrum that has me stumped. I was thinking about the twins paradox, where one twin goes out into space, traveling at relativistic speeds for a while, then...

Okay, I'm trying to get to grips with relativity and I have just about come to terms with the twin paradox. This states that two twins could exist and one gets into a spaceship and fliues away from the earth then back again incredibly fast and as a result of relitivity the travelling twin would...

Gravity is the equivalent of acceleration, according to SR. No test can tell the difference. Gravity has been shown, in accordance with GR, to cause time dialation. GPS clocks are set to accommodate for the fact that they're not as far down in earth's "gravity well." Clocks run faster out in...

I thought today was an appropriate day to post this request, since this is the 100th anniversary of Einstein's paper "On the Electrodynamics of Moving Bodies" in which he introduces Special Relativity. (Wiki link) I've read various layman explanations of special and general relativity. I've...

http://www.msnbc.msn.com/id/7423298 I found these animations to be a nice and simple broad overview of relativity. I'm sure most people here won't learn anything new from it but thought I'd share it for those intimidated or unfamiliar with relativity theory. The MSNBC website currently has...

Consider two concepts: "simultaneous", and "stationary". They mean the same thing, but with the roles of time and space swapped. "Simultaneous" means "same time, different places". "Stationary" means "Same place at different times". Ok. Let's say you and I are out in space, drifting past each...

In this thread, I''ll be discussing a few issues pertaining to relativity. First, let's discuss this post, from another thread:- The light we sense is moving through our inner-awareness of space and our inner-awareness of time. The qualitative value of inner-space and inner-time is a variant...

http://www.muppetlabs.com/~breadbox/txt/al.html Einstein’s theory of relativity described in four letter (or less) words…

As always in my threads, it's important that the reader recognises the fact that the things we sense are not real in themselves, but are abstract representations of things. So, we see that Relativity is a theory which applies directly to the world we sense. But is there an absolute reality of...

Can anyone give us an introduction to Lorentzian Relativity and Varying Speed of Light theory? What do you think about it? Has it got potential, or is it whacky? ~~ Paul

I’ve recently started reading a kind of physics-for-dummies, Clifford A. Pickover’s 'Time, a Travellers Guide' . It's fascinating stuff, to say the least, but I’ve been puzzled by one apparent contradiction which I'd welcome any attempts to clarify. The first topic covered is that of...