TIME TRAVEL – A SIMPLE PROCESS?

If you are an engineering student or a Hollywood movies lover, your brain works 10 times faster than usual while hearing the topic ‘Time Travel’. Especially for Hollywood lovers, it reminds the words: Steven Spielberg, Christopher Nolan, Tenet, Interstellar, Back to the Future, Primer and Predestination. Somebody thought it is a myth but many claims that, everything is possible in the world of science. In this simple study, we are going to see some possible ways of time travel (if it is possible in the future). If you find a way to time travel after reading this, that will be my success in writing this blog (don’t take anything seriously). So quickly see some possible ways here,

1. Time travel using speed

          This is actually a very simple method of time travel and every one of us know this method very well in fact every one of us making this time travel in our life already. Not a joke, we are already practising this type of time travel.

Whenever a person or an object moves very fast (more than imagination level), that makes a move into the near future. Actually, this is a proven one by scientists. If this speed meets the speed of light (3×10⁸ m/s) then you are a time traveller. But the highest ever speed achieved by humans through a vehicle is 39,937.7 km/h which is equal to 11093 m/s. (Achieved by the command module of Apollo 10).

Movies that showed this method are: Back to the future (1985 – 1990) and Men in Black 3 (2012).

2. Time travel using gravity

This method is proposed by Einstein as general relativity theory, hopefully, every one of you is aware of it. This is almost similar to the first method, increasing speed reducing the speed of time there and increasing gravity reducing the speed of time here.

So, if you like to time travel using this method all you need is a strong gravitational force generator, which should have an escape velocity more than the value of the velocity of light (Note: Escape velocity of earth is 11.2km). Your guess is correct; you need a black hole to make time travel by this particular method. But keep it in your mind; you can’t escape from the black hole thereafter.

Movies showed this method: X-Men: Days of Future Past (2014) and Interstellar (2014).

3. Time travel using suspended animation

More researchers spend time on this particular project because this is very much a possible method and is not actually time travel. The idea behind this method is very simple, slow down the ageing of your body. You may know about this method if you watched the movie ‘Oblivion’. By keeping the human body in hibernate state; we can slow down ageing. Many animals are already practising this method to live without food and water for long days like bumblebees, hedgehogs, turtles, groundhogs and raccoons. This method is not only simple but also a very dangerous one too.

Movies showed this method: Realive (2016), Oblivion (2013), Demolition Man (1993), Forever Young (1992), the minority report (2002) and Late for Dinner (1991).

4. Time travel using wormholes

A wormhole is a tunnel between 2 black holes. So, obviously, you got the point here, this method is almost similar to the time travel using the gravity method. Albert Einstein believed that there is a strong connection between these worm holes and space time (general relativity). He thought that if we reached a wormhole, then we can travel through time to anywhere (This method is explained in detail in the movie Interstellar). As I said earlier, the gravity method is so dangerous: now think about this method deals with two black holes (very dangerous). Stephen William Hawking has also believed wormholes have a definite connection with space-time due to their quantum properties. Quantum physics is another very interesting topic; anything is possible in the quantum world like instant travel to long-distance, fastest communication and time travel.

Movies that showed this method are Interstellar (2014) and Avengers: End game (2019).

5. Time travel using light

This concept was proposed in late 2000 by the American scientist Ronald Mallet (Known as the father of time travel, working as a professor of physics at the University of Connecticut). He explained this method in a very simple phrase, “We can twist space-time by simply rotating a cylinder of light”. He explained that we can travel along time in both ways (past and future) by using the correct geometry of the cylinder in this method. Many scientists state that this method should not work because of the wrong physics assumptions given by Ron Mallet. This method is not shown in most time travel based movies. But you can see the setup of this method in Avengers: End game movie.