24 Feb 2019

Time travel in past is possible or not?

Time travel in past is possible or not?Time travel in past is possible or not?

Time travel one of the most debating and interesting topic of our time. There are lot of  theories and hypothesis are given by different scientists. And also there are lot of movies, dramas, comics, stories and books based on time travel are available that makes time travel more interesting.

Now, what if I say, we are experiencing time travel every day?

I know many of you will not agree with me and will say this is not possible. But, actually it is true that we are experiencing and also are witness of time travel, and it also relates to theory of relativity, let me explain....

We all know our artificial satellites revolves us around the distance of 20,000 KMs, so the gravitational pull of Earth makes very less effect on satellites compare to on the surface of Earth. This resulting the satellite clock to move faster to the clock present on the Earth. And this is how this phenomenon evidences the theory of relativity. Not only satellites but also the astronauts in spaceship and on space stations are going through this phenomenon. So we can simply call them space travellers as well as time travellers.
Time travel in past is possible or not?

But, when we think about time travel we remember those scene’s from the movies in which we see them travelling few years forward or backward in time. Here, if we take look on theories on time travel all says future travel is possible. And we know that one who knows about time travel agrees with the fact of future travel.

But what about the past travel, does any theory or possibility exists regarding the fact of time travel in past? And we know if there will be any possibility on it then different paradoxes will come to resist it ,i.e., grandfather paradox, etc. But apart from knowing this all we are still interested to find something that makes it possible.
So lets find out these possibilities.........

Why we think time travel in past is not possible?

About time we all knows and realise that it moves in just one direction. As from past to present and from present to future and not any person have control over it and no one can stop it.

And it also fits with the theory of relativity that time flows in only one direction that is future. If time followed the other way then people should know there future as they know their past, but it is not so.
But what if somebody wants to make time machine that goes to past. In that case he has to involve exotic gateway called wormholes, or to create some frictional surrounding gateway using technology that is not yet available to the science.

Time travel through worm holes

The idea of making time machine and to travel into the past through it, as what we see in movies and in comics or books is likely the dream stuff. But, our astrophysicist given us a possible pathway by harnessing the power of black hole to venture space time.
Time travel through worm holes

Now find out , how it works?

According to general relativity a rotating black hole could create a worm hole that is a hypothetical link between two points of space time or even two points in different universe. But, here the problem is with black holes because they are  unstable and un-transversal  and also we have not any physical proof of any worm holes till now.
But through theoretical physics still there is hope of worm hole and we are trying to predict that what would happen inside the worm hole. And also even now we have not enough improved technology to make spaceship that could survive in the black hole.

Warning of worm hole!

Warning of worm hole!

If anyhow we make it possible then still there are some more problems to face, and one of them is “where will be the another end of worm hole open?”
Yes, we know about the ends of worm hole but we don’t know where does the other end will open or where we will teleported by it.
It would be anywhere like it would be any other planet, moon or even on the surface of any star or in a empty space or even in another universe. We even can’t guess where worm hole can teleport us, it could be in another timeframe would be in future or even in past.
And even we make it land anywhere safely then here we don’t know, would we come back to earth or not or will be travelling from one point to another point in the universe or even in multiverse or even in different time period.

Issue of paradoxes in past travel

Time machine

Even we make it possible to travel in past then paradoxical issue is still a problem. That is what if i go to the past and kill my grandfather before marriage then how i m here or if i go to the past and kill Hitler will the whole history changed.
But here it is not a big deal because here it is solved by the theory of multi-universe. This theory says if we make it possible to travel in past then we will not be traveling in our universe it would be another universe and any change in past will make change in our universe.

So, time travel in past is possible or not?

Yes, it is possible if we analyse it on theories and hypothesis that we have. And we can say it is not possible if we see it regarding the present technologies that are currently present. As we know technologies are improving very fast so we can consider the time travel in past as a possible phenomenon.

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