Time Travel Theories

Time travelling is one of the most questionable topics discussed over the years. Yet nobody ever succeeded in proving this theory. Some say time travel is possible while others say it is not. there are many films made on time travel like " Star Trek", " Back To The Future" and so on. But is it possible? Well, to be honest, the answer still remains a mystery.

Time travel simply means to travel back and forth in time. It is said that time travel is only possible if one succeeds to achieve the speed of light. It is also said that during time travel, time passes very slowly. Many scientists have put forward their theories about time travelling, while, the most effective one was put forward by the great physicist Albert Einstein.

Albert Einstein

Albert Einstein was a famous physicist and mathematician who lived in the 20th century. His works changed the way mankind look at the universe. He contributed the groundbreaking idea of time travel, that is, the theory of relativity. This theory simply explains the relationship between time and space. The first theory, the special theory of relativity, is all about what is absolute and what is relative. After a decade, Einstein moved from the special theory of relativity to the general theory of relativity. This theory explains how gravity can bend time. According to these theories, travelling at the speed of light makes everything slow and almost still but travelling at a speed more than that of the speed of light can reverse time. Both these theories have been proven theoretically and have been found very accurate.

Wormhole

We have all heard about wormholes once in our life. Wormholes are another way of time travel and were derived from Einstein's theory of relativity. With the help of these, one can travel backwards and forwards through time. Well, wormholes' existence is yet to be proved. Talking scientifically, wormholes connect two points in the space and create a tunnel between them. This enables object entering one side of the tunnel to instantly reach the other side of the tunnel.

Apart from Einstein, there are other people who also proposed some theories about time travel. Astronomer Frank Tipler was one of them. He proposed a mechanism that would actually work for astronomers or space travelers. In this mechanism, one should take matter which is 10 times the mass of the sun and then roll it into a long cylinder and set it to spin for a few billion revolutions per minute. After the revolutions, anything that follows an exact spiral around the cylinder could get itself end up on a closed, time-like curve. But this method too has many shortcomings.

Apart from the above discussed there are some more ways of time travelling, like the black holes, cosmic strings and yes, of course, the time machines. Well if time travelling is possible, it it still safe? Well, it is not necessary that one can survive it. The economy of the world can be disturbed as energy and mass are moved from one dimension to the other. Compared to the advantages of time travel, disadvantages weigh more. But if one is willing to take the risk and play it safe, much can be achieved.