Is a Time Machine Technologically Possible?

A time machine is a time-traveling machine in Wells's 1895 book Time Machine. On the surface, this seems nonsense, but since the theory of relativity was proposed, the time machine has theoretically been supported.

Time Machine

("Time travel" machine)

since

In physics, time is considered as the fourth degree of space except length, width, and height. When you walk from home to the retail store, you have moved in three dimensions of the space: length, width, and height. In fact, you have also exercised in the fourth dimension-the time dimension.

Charles also said that speculation based on astrophysics theory shows that people can come and go freely in the three dimensions of space. But for the time dimension, people cannot be so free. In the four-dimensional space-time, for the time dimension, people can only move forward, not backward.

Astrophysicist, City University of New York, author of Space: Our Home in the Universe

Another theory loved by space-time travel enthusiasts is the cosmic string theory. Cosmic string theory says that in an expanding universe, there is an energy tube that runs through the entire universe. These thin tubes are the remnants of the early universe. It is said that the mass is very large and can cause huge bending in the space and time around.

Richard Gert is

Regarding time travel, people have had many beautiful reveries. One of the most mature ideas is through

1. Find or create a wormhole: This is a tunnel that connects two locations in space. Large wormholes may naturally exist deep in space and are the remains of the Big Bang. Otherwise, we have to fill the atomic wormhole. They may exist naturally (some people say they are constantly emerging and disappearing around you and me), or they are artificial (such as imagined here, made by particle accelerators). These ones

Speed is one way to make time jump forward, and gravity is another way. In Einstein

Strictly speaking, the speed of light is the fastest speed in the world, but humans can't reach the speed of light at all. The scientific community asserts that the existing human aircraft wants to reach the speed of light unless it burns all the energy on the earth at the same time.

In other words, reasoning that humans can understand is nothing more than material reactionary propelling force, but this is

What would we hear if one minute went away from the origin at 0.5 times the speed of sound?

At one second, it was 0.5 seconds from the origin, and the distance was reported to be one second, but we heard this event at the origin, and it took another 0.5 seconds, so we found that at 1.5 seconds of the local clock, the clock at a distance was 1 second. When the clock is 3 seconds, the remote clock reports 2 seconds, that is, when we ignore the measurement time, we mistakenly think that the clock that is gone is slow. And the faster the clock, the slower the clock. Beyond the speed of sound, we will catch up to the sound made by the bell, that is, first hear the bell knock 3 times and report 3 o'clock, then hear the bell knock 2 times and report 2 o'clock, and then hear the bell knock 1 and report 1 o'clock, This is faster than the speed of sound

More than a decade ago, Hawking once asked the question: if time travel is possible, why haven't there been so many time travellers from the future world around us? The subtext of this question is: The time traveler has not come around us, the most likely reason is that time travel throughout the long river of time-that is, forever-has not been realized. Of course, Hawking did not take such a problem as a serious theoretical martyrdom for the time machine. However, his question caused some physicists to think, and they found a possible answer: that is, the theoretical model that we currently know is likely to achieve time travel, there is a possibility that is universal The common feature is that time travelers are not allowed to return to the time before the existence of time machines. Therefore, if someone built a time machine in 2500 AD, time travelers can only visit the years after 2500 AD, they can never come around us, let alone go back to prehistoric times as depicted in some science fiction novels. Capturing dinosaurs-history whose history has been or will be irretrievably swallowed up by time, as the American physicist Brian Greene puts it: every age before the success of the time machine will become us and us For future generations to never touch.

In this sense, if time travel was possible, building a time machine a day earlier would save another day of history. ^[5]

In 1905, Einstein said in his theory of relativity: time is relative. When we move at or near the speed of light, time will be slow or stationary. That is, if a person travels near the speed of light, then Time will stagnate for him. This is very exciting. When a person travels on a spacecraft near the speed of light, the time will slow down during the journey. Therefore, when he returns to earth, he may already have After a century. For him, it only takes a little time to enter the future world. ^[7]