time travel?

Question

For example, can anyone tell me what's the nearest distance between 2 points on a sheet of paper? Most of them would say a straight line joining them would be the shortest distance. I read somewhere that it's actually zero. The trick is this, you fold the paper and woo! zero distance! This applies I think to this universe as well. For example you want to go to this place in maybe Saturn. If you have the power to fold space and time you would be there instantly! Sounds interesting but like impractical.

To add on the time travel, i think that the fact we can travel back in time only if we can go beyond the speed of light.(although i think we will break into massless particles before we hit it) but i think seriously maybe in the future when we invent more we can do this time travel.

Answer 1

You have fallen for a common misconception. The faster you travel, the slower time gets until you reach the speed of light, then time stops. So, if you go faster than light, time must go backwards, right. . . WRONG.

The rate time slows down is T’ = T sqr(1-v²/c²) as you can see, as V gets bigger then T' gets smaller until V=c then T'=0.

However, if v>c then what happens . You are trying to take the square root of a negative number. The square root of a negative number is an imaginary number, so if you are going faster than light, time does not become a negative, but instead, it becomes imaginary!

What imaginary time is like I have no idea, but it is not negative.

Answer 2

Yes and Einstien tackled this very problem and decided it could be done given we find a way to do it,the question is would we really want to do that. E=MCsqd says as we approach the speed of light mas becomes infinite. In other words all the atoms that make up uor bodies the spaceship etc. are pulled apart to infinity the question then becomes who or what will be at the other end to put it all back together. Light in the universe is a slow poke when measuring the time it takes to reach a particular target. For instance to reach the nearest star system would take us 10,000 years one way and another 10,000 years to return as measured by earth time. The proposition that all those we left behind will have longago passed on and the earth may not exist as we knew it when we left if it exists at all is not an intriquing thought. It is kind of like using blackholes in space to instantly travel to anywhere as was worked out by Einstien/Rosen. They advanced the theory that blackholes in space could be used as a time travel type mechanism by theorizing flying through a blackhole via an Einstin/Rosen bridge could be possiable. The question is who would volunteer for such a journey as it would be a one way trip and communications would not be possiable so we would never know if they made it or not. Thats assuming they weren't pulled apart by gravity first. Interesting stuff and to reiterate the old saying (if it weren't for the mysteries in life and the challenges life would be rather mundane) it gives us a reason to go on and who knows that one day all this may be possiable after all...

Answer 3

Could happen in theory. take a look at "Black Holse: A Traveler's Guide" by Pickover. If you thought time travel was just for science fiction nuts, think again. As Pickover demonstrates, time travel is not the stuff of Asimovian dreams, it being theoretically possible. Of course, how to travel through time is no simple matter, nor is explaining it, but Pickover rises to the challenge in many ways. Witty and profound quotations?from Einstein to Woody Allen?about time and our relationship to it are liberally scattered throughout. Pickover's masterstroke, however, is to divide each chapter into two sections. The first is a second-person narration recording the impromptu discussions about time-travel of a Chopin-obsessed curator from a Museum of Music with his assistant, "a Zetamorph, a member of a race of philosophers from a subterranean air pocket on Ganymede, a moon of Jupiter" and with a female earthling student. The second section, dutifully labeled "The Science behind the Science Fiction," is a sober essayistic review of topics addressed in the narrative half. Despite the popular tone, Pickover does not shy away from the mathematics of time travel. (He even includes an appendix of programmable algorithms.) A careful reader with some basic science should be able to follow Pickover chapter by chapter (and truthfully, some of the formulas can be skimmed). The imaginative and humorous approach makes a difficult subject palatable?and gives a plug for Chopin at the same time.

Another good account of this is "Time Travel in Einstein's Universe" by Richard Gott.

Answer 4

Yes you have a great idea..folding of space time reduces the distances..
BUT here you are folding the some part of the paper and by this many points in the paper also gets disturbed.If u imagine this with space time,it is not empty it is filled with many objects and this may disturb it.Also bending of spacetime leads to many consequences as Einstein explains how the bending of space time leads to gravity(Actually gravity is due to bending of space time)..hope u think about it :)

As theory says we cannot go back into the past..
But i think exceeding speed of light limit may help this,cos by basing relativity equations one needs negative velocity(not the direction as we think,as -ve vel. is understood as opposite direction)which is quite impossible
THINKING THIS IN A FICTIONAL WAY,if we are in the past and one from the future had found the way to travel into past he would have come here now.. y didn't we see him?

Answer 5

I think that it is a bad thing to travel in time because people will be in the future and others in the past every one will get confused and sometimes people could have problem going back to present and will have to live in an other time.