Time travel
By lizeri
@lizeri (533)
Philippines
2 responses
@mindless_body (100)
• India
7 Apr 07
well it may be possible using worm hole:
Wormholes are a type of warped spacetime which are also permitted by Einstein field equations of general realtivity, although it would be impossible to travel through a wormhole unless it was what is known as traversable wormhole.
A proposed time travel machie using a travesable wormhole would(hypotheticaly) work something like this. One end of wormhole is accelerated nearly to the speed oflight, perhaps with an advanced space ship, and then brought back to the point of origin due to time dilation, the accelerated end of wormhole has now aged less than stationary end, as seen by an external observer, however the time connects differently throught the wormhole then outside it, so that synchronized clockks at either end of the wormhole will always remain synchronized as seen by an observer passing through the wormhole, no matter how the 2 ends move around. This means that an observer entering the accelerated end would exit the stationary end when the stationary end was the same age that the accelerated end had been at the moment before entry; for example; if prior to entering the wormhole the observer noted that the clock at the accelerated end read a date of 2005 while a clock at the stationary end read 2010, then the observer would exit the stationary end when its clock also read 2005, atrip backword in the timeas seen by other observers outside. One significant of such a time machine is that it is onmly possible to go as far back in the time as the initial creation of the machine; in case it is more of a path throught time than it is a device that itself move through time, and it would not allow the technology itself to be moved backward in the time. This could provode an alternate explanation for Hawking's obseravtion: a time machine will be built someday, but yet not has been built, so the tourist from the future cannot reach this far back in time.
According to current theories on the nature of wormholes, construction of traversable wormhole would require the existance of a substanceknown as "exotic matter with negetive energy. Mnay physicist believe this may actualy be possible due to the casimer effect in quantum physics. Although early calculations suggested a very large amt of -ve energy would be required, later calculations showed that the amt of -ve nergy can be made arbitrarily small.
In, 1933 Matt Visser argued that the 2 mouths of a wormhole with such an induced clock difference could not be broyght togather without induciong quantum field and gravitational effects that would either make the wormhole collapse or the 2 mouths repel eachother. Because of this, the 2 mouths could not be brought close enough for casualty violation to take place. However in a 1997 paper, Visser hypothesixed that a complex Roman Ring(name after Tom Roman) configuration of N no. of wormholes arranged in a symmetric polygon could still act as time machine, although he conclude that this is more likely a flaw in classical quantum gravity theory rather than proof that casuality violation is possible.
@mindless_body (100)
• India
7 Apr 07
Terms:
1] Wormhole:In physics wormhole is a hypothetical topological feature of space time that is essentialy a shortcut through space and time. A wormhole has atleast 2 mouths which r connected to a single throat.
2]Einstein Field Equation: The einstein Field Equation(EFE) are a set of ten equations in einstein's theory of general relativity in which the fundamental force of gravitation is described as curved spacetime, caused by matter and energy.
3] Lorentzian traversable wormholes would alloow travel from one part of the universe to another part of that same universevery quickly or allow travel from one universe to another. Wormhole connects 2 points in spacetime, whjich menas that they would allow travel in time as well as in space. The possibelities of traversable wormhole is generaly relativity was first demonstrated by Kip Thorne and his graduate student Mike Morris in a 1988 paper, for this reasoon, the type of traversable wormhole they proposed, held upon by a spherical shell of exotic matter, is reffered to as a Morris-Thorne wormhole.
4]Time Dilation: It is the phenomenon where by an observer finds that another's clock which is physicaly identical to their own is ticking at a slower rate as measured by their own clock. This is often taken to mean that time has "slowed down" for the other clock, but this is only true in the context of the observer's frame of reference. Localy time is always passing at the same rate. the time dilation phenomenon applies to any proess that manifests change overtime.
5]Exotic Matter: Exotic Matter is a hypothetical concept of partical physics. It covers any mataral which which violates oine or more classical condition or is not made of known baryonic particaals Such material would possess qualities lkike -ve mass or bieng repelled rather than attracted by gravity. it is used in certain speculative theories, such as on the construction of the wormholes. The closest known real representetive of exotic matter is a region of pseudo-negetive pressure density produced by the Cassimer Effect.
@mindless_body (100)
• India
7 Apr 07
6] Cassimer Efect: In Physics the Cassimer effect is a physical force exerted b/w seperate objects, which ios due to neither charge, gravity nor the exchange of particles, but instead is due to resinense of all pervasive energy fields in the intyervaning space b/w the objects. this is sometime described in terms of virtual particlesinteracting with the objects, due to the mathematical form of one possible way of calculating the strength of the effect. Since the strength of the froce falls of rapidly with distnace it is only measurable when the distance b/w the object is extremely small. On a submicron scale, this force become so strong that it becomes the dominent force b/w uncharged conmdutors. IOndeed a seperation of 10nm - abt a 100 times the typical size of an atom - the cassimer effect produces the equivalent of 1 atmosphere of pressure (1.033 kg-force/cm^2)
7]Casuality- It describes the relationship b/s causes and effects, and is fundamental to all the nature sciencs, especially physics. It is also studied from the perspective of philosophy, computer science and statistics.
8]Roman Ring: A Roamn Ring in theoretical physics, is a configuration of a wormholes where for each individual wormhole the time difference across its mouths is such that it may not allow a closed timelike curve(CTC), or "closed time loop". If these wormholes and their mopuths are arranged in a suitable configuration, a closed time loop will be again possible.
@ela2pso (364)
• Philippines
3 Apr 07
first, when i was a child it was a question answered yes... 'its tru'
but then when ive grown twice of that age, ive realize its not, but then im still dreaming to have one.. lol!
if it is true i may change the wrong deeds... i may turn back a days to change my direction, to be in a better way but.
God has plan for me,,,
and i really love the day where i am today.
THANKS for askin lizeri...
enjoy mylot!
TC:)
