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I changed the words,"…later experiments revealed that time slowed down at higher speeds of the reference frame relative to another reference frame…" to "…later experiments revealed that time appeared to slow down at higher speeds of the reference frame relative to another reference frame…." Paine Ellsworth reverted my change. Since scientists admit that they are observing phenomena [appearances], I would like to know how anyone can possibly know that the time dilation occurs apart from an observer's measurement. It is a mutually relational phenomenon in which any observer always measures no change in himself but measures change in the moving external object, regardless of which is the observer. Lestrade ( talk) 16:26, 11 March 2011 (UTC)Lestrade
I don't quite understand this. The article makes no mention of these things:
Lanthanum-138 ( talk) 11:47, 23 April 2011 (UTC)
This graph is stupid--- 3 time and 1 space dimensions is indistinguishable from 1 time and three space dimensions. It should be symmetric about the diagonal. — Preceding unsigned comment added by 69.22.238.161 ( talk) 05:58, 20 August 2011 (UTC)
can any one explain theory of relativity to a 15 yr old please???????
Hi. I'm not really an editor on here nor do I know much about physics past high school. I was wondering if this page should be edited to include new information that NASA's released about their Epic Space-Time experiment. Maybe someone could make a new page about it or something? Just an idea. 124.168.140.62 ( talk) —Preceding undated comment added 04:37, 13 May 2011 (UTC).
Some recent vandalism was "repaired" by hand rather than reverting, and this paragraph was lost:
I can't tell for sure whether the omission is accidental or intentional. — Tamfang ( talk) 15:57, 23 May 2011 (UTC)
"World line" or "worldline" or even "world-line"? shouldn't it be consistent? — Preceding unsigned comment added by 131.111.185.74 ( talk) 15:45, 7 October 2011 (UTC)
"There exists a reference frame such that the two events are observed to occur in the same spatial location, but there is no reference frame in which the two events can occur at the same time." Surely this should be vice versa. — Preceding unsigned comment added by Andrewthomas10 ( talk • contribs) 13:45, 7 December 2011 (UTC)
WE say that time is dirrerent when we go to outer space.Can the flow of tme can change?Does the constant time frame of Einstein hold only to earth?cant it be that in outer space the velocity of events have changed or the distance has been changed(phenomenon of space warp continuously occuring)/ — Preceding unsigned comment added by 202.51.84.7 ( talk) 09:12, 15 February 2012 (UTC)
Tegmark (1997) is a non-peer reviewed letter to the editor. Is there any evidence that its claims about ultrahyperbolicity of multiple time dimensions are reliable? This article should not rely on it as if it were a peer reviewed source. 71.215.74.243 ( talk) 08:35, 1 April 2012 (UTC)
Is the following appropriate for an entry as an external link? If not, what can be changed to make it appropriate?
In the universe, we know that all galaxies are moving away from each other. Far distant galaxies are faster than the ones that are close. With the expansion of the universe while galaxies move away from each other, due to the gravitational forces galaxies do not disintegrated. Like constant particles, on a balloon which is getting inflated. Now we choose two particles on the surface of the balloon. Let's call (a) for the distance between two points on (1,2) surface and (a') (wormhole) for inner virtual distance of these two points.
With swelling of the balloon these two points will move away. Let's call these distances b= (a+c) and b’=(a’+c’).
(b-a=c) This difference is the amount of these two positions in a determined amount of time interval while moving away from each other.
I have no explanation for the difference of wormholes (b'-a’=c’). But it may be related to time. (To measure them, we have to know the distance from center of universe and fixed angle of these points. )
Let’s change perspective a little bit.
Imagine an observer fixed in space at the point of “2”. At the same time the observer is traveling to a different point (1') by time during the expansion of the universe although he is not moving in space.
This movement (2-1) gives us the current time for observer. Of course, time is not just a line as shown here. (Imagine this point as any point in the universe. Then imagine an expansion takes place in all directions where the first point moves to a different point. )
The first three coordinates of the observer will be same in space when traveling from point of "2" to point of (1). [(x, y, z)=(x', y', z')]
Only coordinate of (2) changed to (1). Therefore, time is irreversible.
After all this summary, I can brief my assumption.
Einstein makes a law for all the movements with special relativity: The resultant velocity of all objects in space and time is always equal to the speed of light. Compound movements of the object always complement each other in space and time. A portion of the movement in time of the object at the speed of light is transferred to move in space, so that the resultant movement remains constant. This is slowing down of the movement of the object in time.
Now we consider an object fixed in space. This object coordinates (x,y,z) are still constant, although it is in the expanding space.
However, there is a difference between the first the second places.(2-1). And it has a constant speed to travel this difference.
If the mass is low, it moves easily in the elastic tissue. Its speed is high. If mass is zero then it moves completely with the texture of space-time at the speed of light.
If it has mass, space-time texture will resist while it is moving in. (Higgs field) If we succeed to rise its velocity, its speed will be closer to the speed of time wave. But it will never be faster than time wave.
Like a surfer on waves. The maximum velocity of surfer can only be the speed of wave. Otherwise, surfer can not be faster, unless s/he leaves the wave.
If space-time was not expanding at the speed of light like a wave, the photons could neither act like a particle nor like a wave. Photons look like the particles moving with the wave. The time is the force which pressures the space for expanding. “Time” might be the dark energy.
Imagine a liquid balloon which is expanding with its full texture. Its density is homogeneous and containing particles with constant rate. The particles will be away from each other while expanding.
Let’s try to imagine the movements of these particles. While the ballon is expanding, the particles will be away from each other at lower speed than expanding speed of outside, the periphery of the balloon.
The particles moves in vectorial direction. However their three coordinates (x,y,z) are still same according to balloon. They have an unnoticeable speeds which enable these movements. The particles gain a steady momentum. This gives them mass. Masses of particles do not increase anymore. But they maintain constant mass while they are surfing with the expanding balloon.
( BURTAYM ( talk) 15:10, 20 June 2012 (UTC))
In the "Basic concepts" section, it is claimed that "spacetime is independent of any observer." In this way, it is an object that is without a subject, something known that is without a knower. Such an unknown known entity had been sought for many centuries. Lestrade ( talk) 04:03, 15 September 2012 (UTC)Lestrade
I don't understand this sentence. How is "if N = 3" compatible with "in any selected spatial dimension"? — Tamfang ( talk) 06:10, 7 October 2012 (UTC)