Relativity

Ok bear with me according to einstein nothing can go faster than light. as any any object at that speed would gain infininate mass which would obvioulsy be a problem. However as i understand it Black holes are formed by having such a strong gravitational pull that even light cannot escape. Now what this implies and I stress implies because we do not know for sure, that light has some mass for the gravity to effect. By logical reasoning this means that light traveling away from the black hole will have a force exerted on it strong enpough to slow and then reverse its direction taken another way light heading towards the black hole will have its speed increased by the sam…

in a spacetime with axial gauge fluctuation of metric component [math]h_{uv}[/math] ¿what mean the transverse traceless TT [math]h_{uv}^{TT}[/math], and non transverse traceless NT [math]h_{uv}^{NT}[/math] component??

Let us take an observatory with a certain clock and space axes. We may have many still objects in our space with known positions (distances, angles). All of them belong to and constitute our observatory. We observe a moving body by recording time and observed positions, thus we obtain r(t), v(t), where r and v are 3D vectors. Now we may have two situations: non-relativistic and relativistic. In the non-relativistic situation the observed r(t) and v(t) are the instant, actual body data. In the relativistic one r(t) and v(t) are the retarded data. Knowing the light velocity we can always recalculate the “instant” data from retarded r(t), v(t). For directly observed dat…

Hi, I first searched the web for/and joined over half a dozen science forums because a specific question had bothered me for a long time. That first post is here: http://www.scienceforums.net/forum/showthread.php?t=44928 (I had already belonged to a few science forums so it won’t be my very ‘first’ post everywhere). I thought the question was certainly a easy one: it was basically ‘if motion is relative why isn’t rotation relative’ (I was looking for a cleaver way to explain artificial gravity for my latest sci-fi book). I was dumbfounded by the responses I got—everyone had a different answer! People (scientists, students, forum administrators ) were arguing wi…

Hi, I've wanted to ask this question for decades and I'm sure it's the oldest, tiredest relativity question around. Take a universe with nothing in it (or nothing visible) -- no external reference. Then take a barrow and drill a hole in the center of each end and place a rod through the barrow long enough to extend from each end. Now put some air in the barrow and a person. Finally weld a handle on the inside wall of the barrow. Got all of that (know where this is going?)? Place all of this in the frame-less universe and spin the rod that runs through the barrow. Inside, the person holding on to the handle otherwise floats around watching the rod above…

As research and collected data have confirmed the Universe is most likely in an expansion phase. When we imagine the expansion fo the Universe we see an origin or center and then an infinite expansion in all 3d (4d/ Space time). My question is: are all sides of the expansion of the universe symmetrical? To rephrase, Considering a 3d circle expansion (sphere) will the radius of the finite or infinite system be the same in all positions or vary?

If you were in outer space's low gravity, near an object pretty much your size, and that object's racing around a small track of < 10 foot diameter at say 80% c, would it attract you with a stronger gravitational force than it would've if the object had instead been at rest? You're outside it. Trying to deduce how the equivalence principle works. I'm thinking the object's mass will be "virtually" increased by the speed, and so its gravity would be stronger than if at rest.

Is it possible that Einstein's theroy of reletivity might have a little flaw in it.Or is his theroy carved in stone\? and cannot be disputed

It is said that the universe is expanding at an accelerating rate and that galaxies will reach and exceed the speed of light. At such speed relative time should slowdown to zero and thus motion should cease. To avoid this paradox I would suggest that the expansion proceeds at a universal time.

Is it possible at all to travel to other planets and star system in a convenient time span? I feelings are that civilization has to colonize other planets in order to survive. We are already past the carrying capacity of earth, and it does not look like we a slowing down. Without faster than light travel we are doomed :eek: :eek:

To my knowledge there are two natural generalisations of Killing vectors on a (even) Riemannian manifold. 1) Killing--Stackel fields, which are understood as symmetric fields. 2) Killing--Yano fields, which are antisymmetric fields. To my knowledge there is no clear geometric interpretation of Killing--Yano fields (either as differential forms or multivetor fields). Let me just explain the symmetric case of Killing--Stackel fields. Let [math](M,g)[/math] be a Riemannian manifold. (What I say will also hold on even Riemannian supermanifolds). I will understand a Killing--Stackel field to be a function on [math]T^{*}M[/math]. Similarly we can understand the…

Someone suggested that you could observe a black hole's singularity, briefly before your inevitable death, by passing through the event horizon to look at it. As I understand it, so long as the black hole is big enough, you could survive the tidal forces that would be acting on you getting close to the event horizon. Now, my question is this: even if you were to go inside a black hole, I understand that the things there are falling faster than the speed of light toward the singularity. Wouldn't this mean that you wouldn't actually be able to see where you were falling?

As we approach the speed of light and beyond, Wouldnt Light start to gain physical mass as we know,And if so wouldn;t we have to chart a course so we wouldn;t colided with light?

What is a worm hole and if there is one, can we bend space time. Is the shortest distance between 2 points in time really a straight line (or line of sight) or can we bend space ( which is made of something wether it be a vaccume or particals of matter?

Here is an essay on my thoughts on time travel. Your opinions on it, please. http://scienceray.com/physics/time-travel-theoretical-properties-and-philosophical-assumptions/

If you were on earth, making a phone call to someone on a spaceship that's travelling near the speed of light, how would the speed of each converser's voice sound? a. Quicker. b. Slow as molasses. This is assuming the phone conversation were transported instantly via wormholes to each other?

The cornerstone of Relativity is that Speed Of Light is finite. What would be the description of a universe in which S.O.L. is infinite? In which way would be our observations transformed ?

If two space travelers are traveling in opposite directions at 60% the speed of light, is the relative speed of one to the other 120% of the speed of light. I know there is a problem with this statement but I don't know what it is.

I don't believe it's possible. I read it in the 'Scientific American Desk Reference' where it talks about black holes. Can somebody please explain this?

I have written a short introduction to show what I am looking at in my paper on Gravitation and Vacuum Polarizability. As below, laps.noaa.gov/albers/physics/na Merged post follows: Consecutive posts mergedThis should be posted by late Monday, tomorrow.

Einstein's 'biggest blunder', was Right After All ---------------------------------------------------------------- "We shall not cease from exploration, and at the end of all our exploring, we may find ourselves where we started, and know the place for the first time". - T. S. Eliot Re: Total Field Theory: Reinstatement of Cosmological Constant & Steady State Theories -------------------------------------------------------------------------------- Quote: Originally Posted by theunify I'm not trying to state the obvious, but since you have had a difficult time in the publishing and promotional areas of scientific work do you suppose you could …

Does anyone happen to know why matter when acted on by gravity will always fall towards the source of gravity? You all know the pool full of jello and the bowling ball analogy. I understand that somewhat, but why doesn't the matter acted on move away from the source? What makes this work the way it does? And how exactly do gravitons fit in? EDIT: Does it always fall towards the source? That was an assumption btw, correct me if I'm wrong.

is the speed of light really constant or can it change based upon where the observer is with respect to velocity. i remeber einstein saying(in his journals) something about that if you aproach the speed of light, the light you see is doesnt appear to be slowing down but rather still going the speed of light faster than you. Thus the speed of light would increase to compensate for the observer. if light acts as a particle in a non vacuum environment then it could be affected by the particles in the environment, changing the speed of light just like everything els. if this is true then how can we accuratly measure the speed of light from anything as these measureme…

Iv'e done some calculations and found a potential error in E=mc^2. Lets take an object with the mass of 1 kg and accelerate it to .866% of c where gamma equals 2, the total energy or mass of this object would now be 2 kg in accordance with relativity. Now assuming that the 1kg mass is moving in a striaght line at .866% of c in the +x direction,at a constant velocity, a constant force in the +y direction is applied to the 1 kg moving mass. According to E=mc^2 any small change in the velocity in any direction of the 1 kg mass moving at .866% of c will appear like a mass of 8 kg's to a force acting on the moving mass. Note this force is acting on the the…

Hi guys! I came upon an interesting idea, unfortunately I don't know how to calculate it. I was wondering how far out would the GPS satellites be for a car traveling say 100 miles if GR was not factored into their programming? How much out would the distances be?