Journey through 4th dimension

TIME TRAVEL

I saw that Indians are increasingly taking interest in time travel.So, I will discuss about time travel in this discussion.

Now, we all will travel in the 4th dimension of time.

1. Time travel could be done in many different ways:-
2. Traveling through wormhole.
3. Traveling at great speeds.
4. Traveling around massive bodies.
5. Considering the idea of parallel universe. 
6. Passing through the black hole.
7. Making massive bodies to move us.

I will discuss all of them one by one .

Wormhole

Wormhole is a type of a hole which link two different place in space-time.[space-time is only three dimensions of space along with one dimension of time]through

Wormhole could be made by concentrating energy in a single place until a hole is created. 

If we are able to make a wormhole , then, we would be able to travel time .

The major problem in creating a wormhole is one that it needs a huge amount of energy equivalent to the energy released in supernova which we will never be able to produce.

Second is that the even if we are able to create a wormhole it opens only for few seconds.

Great speeds

It has been found experimentally and proposed by Einstein theory of relativity that as we move faster

The time runs slower for us. However, this difference in time is very small .

But if we travel at the speed of light then, the time difference in our light clock and other person's light clock is large enough to be noticed. However, because of Einstein theory E=mc^2

where energy is proportional to mass , we could never reach speed of light. This is because that When we approach near to the speed of light , the mass starts increasing at fast rate . As we go closer and closer to the speed of light, the mass starts increasing and at one point it will become infinite. Then we would need infinite amount of energy to accelerate it which could not be achieved.

Travelling around massive bodies

It has been found that when we go around massive bodies the time runs slower.

If we could develop a machine that could go around massive bodies we could travel time.This happens because there is a relation between energy of light and its frequency. As the object go close to the massive body the light looses its frequency due to the gravitational field . So it take more time to reach to the observer. So, it would appear to someone high up on earth that the time is running slower for the people on the earth.

Passing through black hole

Black hole is the region in the space whose density and gravity becomes infinite to such a extend that even light cannot escape from it . If we could make a machine that could travel through the black hole then we could travel time .

 

Making massive bodies to move us

It is believed that the space is made up of a cloth called the space fabric. Massive bodies like sun push this fabric downwards.

If we go around massive bodies like rotating black hole then we could travel at speed close to the speed of light due to the gravitational pull of the black hole without violating the Einstein theory of relativity.

Parallel universe

It is believed that there exists many universe which are same as our own universe . This theory is the result of the string theory which is yet to be proved.

So it may be possible that a too copy of you and me may exist somewhere in the space.