Is Time Travel Possible?

Is Time Travel Possible?

You may think that time travel is an ancient concept. It may be mentioned in Greek myths and Shakespeare's plays. But nothing like that. In fact, it was first mentioned by H. G. Wells in 1895 in his novel The Time Machine.

Science and technology researcher James Glick has written a book on time travel called Time Travel and History.

H. G. Wells' book sold well. The discussion got the same. Images such as meeting historical figures from the time machine in the past, correcting mistakes were included in the book.

Is time travel possible as it is described in books and movies?

James Glick says, ‘If you look at all the books that have been written about this, the concept of time travel is mentioned in those books as fantasy. Maybe it's a psychological fact, if you ask the hundreds of people working on it about it, they won't rule it out. '

Speed ​​of time

Curtin University astronomer. Natasha Hurley-Walker says, "According to any science fiction, the universe is amazing."

Events happen in a particular order, we know that. Scientists agree that time has a dimension of its own. But this thinking has its own problem. The reason is 'light'.

‘If we walk at the speed of light instead of standing somewhere neutral, we readily accept that light will overtake us. But it's not true that people have been using it for decades, but they haven't seen any change in the speed of light. That is why there is a unique continuity in the universe, which is not of time but of speed. '

You may have read the equation of distance and time in school. This simple equation explains how time works. Because the speed of light is always the same. Why don't you just jump with a torch in your hand?

For example, if you have a watch in your hand and you are stationary. Then if you start jumping and slowly start jumping at the speed of light, something strange happens in your watch. The clock seems to be slowing down. The faster you jump, the slower your watch starts to move.

A photon is a particle of light that travels faster than the speed of light. The clock becomes very sluggish. This only happens once for photons. The photons are separated from the surface of the star and reach the earth through the sky. It makes the mind go crazy.

According to Natasha, gait alone does not measure time. It is accompanied by a mass. There are also large objects, such as planets or black holes, that change space-time. Just like we put weight on a trampoline.

We use satellite communications around the earth. The satellite travels at a speed of 14,000 per hour. Look at the GPS satellite technology. It detects where on earth you are through a smartphone.

We need to find out where that satellite is. This is not easy if the clock works differently at a particular time.

The effect of motion is seven microseconds per day and the effect of gravity is 45 microseconds per day. In this case, every second minute GPS satellite time should be the same. Otherwise, all navigation systems are down.

The course of time is not the same for everyone. We see it in the world around us. Can we take advantage of this and move into the future?

Fast forward

"I tried to make telekinesis," says Katie Mack, an astrophysics professor. I don't think it was an attempt to make a time machine. I think it's a good idea to do whatever you want. But no matter how hard I tried, I didn't succeed. '

Katie Mack, a professor of astrophysics in North Carolina, USA, set an ambitious goal for herself at an early age.

We can debate on one question. If time moves differently for GPS satellites, could it move differently for humans?

For example, astronauts on the International Space Station (ISS) live far away from Earth. They orbit the earth at a very high speed. Does this have any effect on them as they get older?

Professor Katie says, ‘Theoretically, it has an effect. The movement of time there is slower than the movement of our time here. But if you stay in the ISS for a year, it's only a few seconds different from Earth. '

Our goal is to travel many years into the future. This is not a matter of a small fraction of a second. How is this possible?

The girl says, ‘Looking at the rocket we have now, there is no big time difference between us and the earth. If we were to get to the nearest star other than the Sun, it would take us a million years with the help of the technology we have now. '

This is a very long time. You can't show that you are younger than your peers. Even if we built a superfast device for space travel, this journey would be risky. If you don't want to travel a million years on a superfast plane, you have another way to travel ahead of time by traveling to the future.

If one wants to change the course of time, his speed must be fast, otherwise, he must stay close to the gravitational field. Even so, owning one is still beyond the reach of the average person. We have no way to go to the past. The girl says it's impossible.

Short cut

The physicist at the University of Edinburgh, Dr. "I have a lot of childhood memories of time travel," says Luke Butcher.

Luke studies the journey of the past. Many physicists like Luke study this. Is it possible if space-time changes? It makes things a little easier.

That is why physicists write mathematical equations. Test their theory. For this, Luke has created the equation of a wormhole. It was conceived in the 1930s by Albert Einstein and Nathan Rosen.

A wormhole is typically a space-time tube that connects two ends. The two ends that connect it are separated from each other and can be two separate ends of time. It can also be called a shortcut from one place to another.

Wormholes have been discussed many times in science fiction such as Star Trek. However, we have no evidence of its presence.

When you write an equation and try to solve it, one of the major obstacles is that it has a warm hole and it is open. But space-time needs negative energy. Inexact words, in the language of physicists, the least energy you can imagine. If Luke could do that, the wormhole would gain the speed of light, which man has no ability to cross.

If you want to look back and see yourself a few hours ahead, this is not possible in physics, but it cannot be denied in mathematics. So this is a potential question. What history has taught us is that much can be learned from such basic questions.

At the beginning of the 20th century, we were revolving around quantum mechanics. Those were interesting theoretical questions. Then we were not aware of the benefits we are getting today. It includes the invention of technology such as computers and transistors.

Again, the question is, can we really travel beyond time? In fact, we don't have a magic button that we can use to move ahead of time.

But according to physics, time moves relative to where we are and as we move forward. If we are willing to take risks, we can move forward. But it is impossible to go back to the time that has passed. Or it may be possible.

But the amount of information we gather about trim travel has broadened our understanding of the universe.