Theory 3 (Wizz theory: mixing both theories)

Taking the concept of velocity from “Theory 2”, it is stated that when we go at the speed of light, the times taken slows down as the beam of light has to travel a longer distance per second. Instead of travelling at the speed of light, if we travel at a velocity that is achievable by us, we can still say that the beam of light will have to travel more distance as to the distance, it would have had to travel if it was stationary. When comparing it to the distance to be travelled by it at the speed of light, the distance travelled by the beam of light at a velocity of about 200-300 km/h is less to a great extent, but when you compare it to the distance at the speed of about 50-100 km/h, then the difference varies to almost the half. This is where the concept of relative time-travel comes.

If you remember the definition of time travel as given in the starting, it states that time-travel is an action of travelling time into the future or the past. On further detailing the definition we can also say that time-travel would mean to reach a particular point in the time-line, before other people reach there. In the ancient times where there were no cars and cycles, if I reached there with a modern day Lamborghini or Ferrari, it would surely make them feel that I had a time machine. I would have been enabled to reach any place, days before them. Thinking about time travel in a car can be a bit difficult, but if u notice, it is matching all the criteria, of time-travelling. According to time travel, I reached a particular destination that would have taken a long time to reach in a short time, just like reaching 100 years in 50 years. In the following example, I will explain a very simple and a normally occurring example.

In the following example, we can see that one of the bodies is travelling at 50 km/h and the other 200 km/h. the body ‘B’ will be travelling at the speed of 200 km/h will take an hour to reach the end point while the other body, body ‘A’ will take 4 hours to reach there. This is how the concept of time travel works. This is a bit difficult to accept, so I will give one more example to display it:

This is the description of what a worm-hole is. The tunnel between the two sides is what a worm-hole looks like. A worm hole is nothing but a short cut to the other part of the universe. And everyone knows that travelling through a wormhole is nothing but time-travel. By travelling through the worm hole, you can reach the same place but using a lot less time.

Thus, we can say that the two ways to time travel, is either by increasing the speed or by decreasing the distance as compared to the original speed or distance. 

Theory 2 (Time Travel at the Speed of Light)

Everyone knows that you can time travel, when you travel at the speed of light. Let me explain to you this phenomenon with the help of an example. Light travels at the same velocity regardless of your velocity and also regardless of the direction, if you are going away from it or towards it. Thus if the light has the same speed all the time, it is time that has to slow down or fasten up to match the speed of light. This will be better explained with the help of a video

http://www.youtube.com/watch?v=V7vpw4AH8QQ

CONCLUSION: the faster you go, the slower the time (fastening the time is not possible)

The most important aspect of this theory is that of THE SPEED VELOCITY 

Everything about time travel (The New Theory):Theory 1 (Space-Time)

Time travel is basically defined as the action of travelling through time into the past or the future. As the time travel to the past is impossible, we will be focusing on the time travel to the future.

Time is like a river. If continuously flows on, never stopping, but, its speed always increases and decreases. The speed of time is affected by the gravitational forces. The best example of this can be the time difference between the watches on earth and those on the GPS satellites. Even though having very accurate and precise timings on the satellites, every day they gain almost one-third of a billionth of a second. This may sound a small time but there are two very important things to that. 1. This small difference can cause as much as a difference of about 6 miles in your positioning. 2. The difference in the gravity for a person on earth and for someone at the satellite is much less as to what might be the difference for someone on the Sun or Jupiter or for someone at some other part of the universe. With this we can also get, that for someone at some other part of the universe, we would be at a much faster or a much faster pace of time as compared to them. This is the base of the theory of why can we time-travel when we are near a black hole. Although practically impossible by the current technological advances, if it can ever be possible, the gravitational pull of the black hole is so strong, that even light, at such a high speed, cannot escape the pull. Thus being somewhere very near to a black hole, the gravitation will be so strong that will be dramatically slower than the speed of time over here at earth. But the main question is that you can only feel the time travel is you have something else as a benchmark. This is where the concept of relative time travel comes. If we go to somewhere where there is a weaker or a stronger gravitational field, we can never detect of we have done time travel or not. If we go to some other time speed, with everything else even the time taken for our reflex and sense perception will change. Thus we will never be able to know if we are going faster or slower, and it won’t make any difference also. The only way that we can use this slowing and fastening of time is if we can by some way, go to a place with a very high gravitational field, like a black hole, and then come back to earth. When we can go to such a place, our ageing speed might decrease up to almost half of what we have on earth. And then when we come back to earth, we will be able to use it to our advantage, thus skipping almost half of the time that we would have to have gone through without going somewhere having a different space-time.

The most important aspect in this theory is that of RELATIVITY.