Anyone who watched both Battle of Britain and Dunkirk understands which of the two is a better war movie
Time Travel
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@TM:
I am sorry, Sir GeZe, but Einstein said Time Travel should not be possible. In Einstein’s Theory of Relativity, it states that nothing can go faster than the speed of light.
that is correct.
Einstein showed that was no such thing as instantaneous interaction in nature, but only a maximum possible speed of interaction. This is the speed of electromagnetic interaction, which is the speed of light or 300,000 kilometers per second. The second part of the Theory of Relativity states that the speed of light is universally constant and the same for all inertial observers no matter how they move.
That is not totally correct. There is instantanous interaction (see: Einstein, Podolsky and Rosen; entangled states), but you cannot use this interaction to transmit information or even matter, but technically it still is an interaction. This is a quantum effect, that is not covered by the Theory of General Relativity.
As an object nears the speed of light, its relativistic mass increases until, at the speed of light, it becomes infinite. Accelerating an infinite mass any faster than that is impossible, or at least it seems to be right now.
This is technically speaking incorrect, though a polular interpretation.
Plus of course: The first only holds for objects with a finite mass at rest. Photons for example move at the speed of light, and have no “rest mass”.However, there is a mathematical possibility of particles that travel faster than the speed of light, called tachyons. There is mathematical evidence for this, though we have yet to detect any of them. Tachyons cannot slow down to below light speed, just as we cannot accelerate to above the speed of light. Perhaps, Herr F_alk could tell us more about this?
Sorry, not too much, except that that is true. Tachyons are theoretically predicted, but i don’t know if there is any way or proposal of how to detect them. Therefor, they will stay where they are: in the space of theoritical objects.
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hmm… i’ve been reading scientific american september 2002 this weekend which is a special issue all about time…
one of the articles descibes a number of possible methods of time travel… and also makes reference to: “einstein confessed that he was troubled by the thought that his theory might permit travel into the past under some circumstances.”
the main example of travelling back in time involves the use of wormholes…
1. find or make a wormhole [with a particle accelerator]
2. stabilize it [read: don’t let it become a black hole] by infussing it with negative energy
3. drag one end of the wormhole to a neutron star where the intense gravity will cause time to pass more slowly. because time passes more quickly at the other mouth the two mouths to the wormhole will be separated by time and space… -
Sorry, not too much, except that that is true. Tachyons are theoretically predicted, but i don’t know if there is any way or proposal of how to detect them. Therefor, they will stay where they are: in the space of theoritical objects
Heh, super-fast particle accelerator. :)
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Everything is within a time frame…
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@TG:
Everything is within a time frame…
meaning?
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People from different locations see time-space differently.
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@TG:
People from different locations see time-space differently.
Ahm … “your” space time always looks good to you. It’s always the others space times that “behave badly”… of course, they think they are the only “normal ones” and you are “wrong” … :)
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Yeah, that pretty much sums up life in general. :wink:
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of course it does :)
Physics describes everything ;) -
Hahahhahaha… so true. :wink:
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hmm… i’ve been reading scientific american september 2002 this weekend which is a special issue all about time…
one of the articles descibes a number of possible methods of time travel… and also makes reference to: “einstein confessed that he was troubled by the thought that his theory might permit travel into the past under some circumstances.”
the main example of travelling back in time involves the use of wormholes…
1. find or make a wormhole [with a particle accelerator]
2. stabilize it [read: don’t let it become a black hole] by infussing it with negative energy
3. drag one end of the wormhole to a neutron star where the intense gravity will cause time to pass more slowly. because time passes more quickly at the other mouth the two mouths to the wormhole will be separated by time and space…That would be extremely hard to do. According to the second law of thermodynamics, things like to move from a state oforder to a state of disorder or chaos. You’d need to put up a hell of a lot of energy to force the wormhole tostabilizie. The nature of things is to move into a state of chaos. For example, if you have a neat room in a certain state and you leave it be, it will eventually become messy and disordered.
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Hmmmm… my room looks just find since the day I left it. :wink:
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Could someone explain how a universe that wants to go from order to disorder(2nd Law of Thermo?) can have evolution (theory) as a key element (no pun intended.) Or is mixing law from one science with theory from another science impermissible?
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@No?isdum:
Could someone explain how a universe that wants to go from order to disorder(2nd Law of Thermo?) can have evolution (theory) as a key element (no pun intended.) Or is mixing law from one science with theory from another science impermissible?
We had that in other threads.
The point is semi-understanding of thermodynamics.2nd law of thermocdynamics: more correctly:
In a closed system processes that reduce entropy are not happening.The earth as a system is not closed: we get energy from the sun!
just short, but that covers the point
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