I heard it is impossible to travel back in time according to the laws of physics?

Question

but one could theoretically travel forward in time. Is this true?

Answer 1

Time travel to the past is theoretically allowed using the following methods:

Traveling faster than the speed of light
The use of cosmic strings and black holes
Wormholes and Alcubierre 'warp' drive

Time travel to the future is theoretically allowed using the following methods:[6]

Using time dilation under the Theory of Special Relativity, for instance:
Traveling at almost the speed of light to a distant star, then slowing down, turning around, and traveling at almost the speed of light back to Earth[21] (see the Twin paradox);
Orbiting Earth for long periods of time (practical, but insignificant);
Using time dilation under the Theory of General Relativity, for instance:
Residing inside of a hollow, high-mass object;
Residing just outside of the event horizon of a black hole
Increasing the rate at which time appears to flow for the traveler by, for instance:
Hibernation
Suspended animation

However since it is humanely impossible to travel travel at the speed of light, it is impossible t travel back in time. However, if we develop the technology, we may be able to accelerate forward in time in the future.

Answer 2

You have traveled forward in time since you started reading this answer, so yes, it's possible.

It's even possible at an accelerated rate, relative to an outside observer. It's called time dilation and it's covered under Einstein's Special Theory of Relativity.

Basically, the faster you are moving, the slower you move through time, relative to an outside observer. So if you leave at 99% the speed of light in your absurdly fast space ship, and are gone six hours, you will be six hours older. However the people you left behind on Earth traveling at slower speeds have aged decades.

Check the Wikipedia link for more info.

Insofar as traveling backward in time, the laws of physics don't necessarily prevent it. It's at least mathematically possible, but again, Relativity has something to say on the issue. The concept of the Light Cone would prevent any information from a given source from traveling to a point where said information could effect the past of the sender. The past is effectively outside the sender's "line of sight." Or maybe just outside the recipients. Perhaps this is why we can't "remember" the future.

Light Cone link is below as well.

Answer 3

Going back in time is "impossible" because you would have to go faster than the speed of light. At the speed of light, any matter would then be destroyed and be turned into pure energy.
Going forward in time is an illusion, because time tends to slow down for the traveler the closer they are going to light speed. Thus if a person were to travel at CTL speeds for say 50 years, they would only perceive 5 years to have passed. If they went back to earth, they would be 45 years further into the "future" than they would expect.

Answer 4

im moving forward thru time right now! lol. anyway heres something to think about. Einstein's work allowed for the existence of wormholes. a wormhole's opening would have 4 coordinates. x,y,z and w, where w is its position in time. if one opening was at a different point in time than the other, travel between the two openings would cause wither traveling forward or backward in time. but no ones found solid evidance of wormholes yet, they are just mathimaticaly possible

Answer 5

technically you don't travel forward in time, by traveling faster than someone else, in your perspective you age at a normal rate, in that someone elses you age slower.

so if you were to hop on a space ship traveling at 1/2 the speed of light, go on a 50 year loop (50 years by your time)and come back to earth, you would have aged 50 years but earth would have aged must more. so everyone in your family would probably be dead and everthing completely changed

Answer 6

i would not rule it out. there may well be another approach besides. endure in innovations, we've in simple terms been techno-savvy for a pair of hundred years. another planet could desire to be engaged on a million plus of it. additionally, no longer too some time past the international grow to be flat and the solar revolved around the earth. Ion propulsion has the promise of very intense speeds, in all probability a million+ million MPH, yet sluggish off the line. additionally, navigation and struggling with recent themes besides. some human beings have additionally claimed to have created chilly fusion, however the international isn't utilising it and that they are not trillionaires. There are inherent issues of "anti-gravity" nonetheless. each thing has mass and consequently has gravity, so the variety of gadget might cancel itself out the prompt it grow to be fired up.

Answer 7

If it were possible I think we would know because someone from the future would have visited us or our past, unless of course, it doesn't happen until way into the future and they don't travel as far back in time as we live....then maybe we would never know.

Time travel would mean we could change history. Your great grandson could possibly come back and kill you. But then your grandson would never have existed. So...what's up with that?

Answer 8

theoretically by tapping into the 4th dimention you could do near anything dealing with the space time contuinum, but acheiving the speed/ velocity to break through the 3rd dimention into the fourth is impossable at this time and for many years to come

Answer 9

yes it is impossible to travel back in time . ... time once gone will never come back..
if this above statement is true then i can answer your query..........
no one in this world is infallible so i say that those who tell horoscopes about people are there only to loot u
future is yours ....................what happens u dont know
and thereby theoretically travel forward in time is false

Answer 10

depends on what you mean by travelling forward... do you mean the passage of time or do you mean as in imagining the future?