Can you really turn back time, can you turn back time

Time is just a psychological experience of human beings, and the present and the past are also a psychological experience of human beings about things in motion, which is the principle of anthropy, in physical terms, which means: why time passes in the way it is now, because we see it this way.

Physicists, on the other hand, believe that it is entirely possible for time to pass (move) in the opposite way, which is called time reversal. Find the right entry point and you can go back in time. This is not impossible, although it is difficult to understand and accept.

All theories are only true to a limited extent or temporarily, not the ultimate truth, so nothing is impossible.

You can read the book "A Brief History of Time" and you may have a new understanding of the concept of time.

Science has developed in this constant questioning and subversion of existing theories and understandings. 。

That being said, if we are talking about relativity, when an object travels faster than the speed of light, time changes but does not set time backwards, but rather that you are moving faster than time, giving people the illusion that you are moving faster than time. If you go back in time like what you said, the question is how much more than the speed of light, I think at least a few thousand to tens of thousands of times the speed of light.

Yes according to the theory of relativity, not according to logic, if time could be turned back, science should be developed enough in the future, why is there no future person back to the present?

There is no phenomenon of backflow on Earth. But the most mysterious thing is the black hole, it can contain everything, as for entering it, whether it will be a paradise is still a mystery, maybe the black hole can turn back time.

I can't turn back, but I also want to turn back time.

According to the theory of relativity, as long as you can exceed the speed of light, you can reach the future. Conversely, as long as you can go below the speed of light, you can go back in time.

If you can change the speed of light in the future, don't forget to contact me.

When dreaming, it seems like you can go back a little bit.

Others pull casually, and when you want it to flow backwards, you will flow backwards.

If you could really turn back time, when would you most like to go back to?

You can't turn back the clock.

Time refers to the time interval, that is, the process through which things evolve and change over a period of time. Or specify the fourth coordinate (and three spatial dimensions) required for the physical event. or a continuum of experience, from the future to the present, from the present to the past.

It can also be freely divided into parts of the same time.

From the perspective of physics, time is irreversible, which means that time can only flow forward, not backward. This is because the advance of time is due to the second law of thermodynamics, which states that heat flow always flows from high to low temperatures, so that time can only flow forward. According to this law, it can be seen that if time is reversed, then the heat will flow from the low temperature to the high temperature, which violates the second law of thermodynamics, so time cannot be turned back.

Philosophical: There is a deeper reason, and that is fatalism. Su Ling talks about the theory of fate, which holds that all events in history are determined by fate and are irreversible.

If time could be turned back, then it would threaten this philosophical view and make fate no longer exist. Therefore, from a philosophical point of view, it is impossible to turn back time. <>

We are just assuming, in fact, time will not go back, and it is impossible to go back to childhood, "if" is just a state that we hypothesize, how much I hope that time can be turned back! I also hope to be able to go back to the time when we were young, although we lived poorly when we were young, but we were happy and carefree, and now that I have reached old age, we really feel that when we were young, we really feel that it was too good when we were young, so we are also very envious of the children now.

If I were given a chance to go back to when I was a child, I would say to me when I was a child: Hello, I am the one you who grew up. It's been 50 years, and I'm still in a difficult time at your age.

We don't have snacks to eat, we don't have pocket money, we don't have new clothes to wear for the Chinese New Year, we can only eat meat two or three times a year, and we have to start taking care of our younger siblings when we are four or five years old. We didn't even have a chance to be spoiled with our parents, and our parents couldn't take care of us. Still, I feel better when I was younger, and although our material life is very abundant now, we lack the joy and carefree that we had when we were younger.

Although we didn't have a decent toy at that time, the girls sewed a sandbag out of rags and filled it with some corn, which was our toy. The boy made his own slingshot out of leather and practiced shooting. Or we get mud, throw mud at each other, bounce glass balls, and we have a lot of fun.

On summer nights, we will sit in the yard or at the door of our house, counting the stars in the sky, listening to the old people tell us the story of the Cowherd and the Weaver Girl, we listen very attentively, as if we are feeling the beauty of another world, thinking that the sky must be very beautiful, there are Cowherd and Weaver Girl in the sky, and peacocks, as well as the vast Milky Way.

Now that I've grown up, I know that the stories told by the old people are unreal, not real. After growing up to be a group god, people have a certain amount of pressure, have a sense of responsibility, and no longer live a happy and carefree life like when they were children, I hope you must cherish the good times of childhood, which is the most beautiful childhood in a person's life.

Although each of us knows that we can't turn back time, but when we reach a certain age, we all want to go back to the age we most want to go back to, if we can go back in time, for me, I want to go back to the time when I was about 20 years old.

First of all, if I can turn back the clock and let me go back to the time when I was about 20 years old, I will definitely study harder and try my best to be admitted to graduate school in college, but also a regret now, after all, with a higher diploma, I can make myself more competitive in the process of job search and employment, so that I will not encounter this more embarrassing situation in my work now, and if I go back to 20 years old, even if I can't be admitted to graduate school, However, I will also carefully consider my career choice, and will no longer be as blind and impulsive as I was back then, but will choose a job that is truly suitable for me based on my actual situation and the development of the industry.

On the other hand, if I could go back in time, I would cherish and make good use of my time at the age of 20, and I would not waste my years, because in my 20s, because I was not mature enough, I spent more time partying with friends, or playing games all day in the dormitory. I will definitely not waste precious time like this, and I will try my best to make effective use of this best time in my life, so that I can truly gain a certain sense of accomplishment and satisfaction through this time, and no longer regret myself like today.

You can't turn back the clock.

Time reversal generally refers to the closed time-like curve in the theory of relativity, given a four-dimensional space, the distance between two points in the coordinate system is 0, in Euclidean space, the distance of two points coincides with 0, but in the four-dimensional space, it is generally believed that there is a time axis, that is, these two points overlap in space, but there is still a time distance, that is, two different times at the same change to bucket point, then a new space similar to a cone will be formed in the coordinate system, commonly known as "light cone", That is, two points that coincide in space can be transferred in time.

If we are in the "light cone", it is called "time-like", and vice versa, it is "space-like", the time machine is to construct a closed time-like curve to achieve reverse transmission on the time axis, which theoretically exists, but according to the calculation, at this time each coordinate is an irrational number, that is, there is a strong space-time oscillation, resulting in space-time instability, and the transmission is completed by the non-nuclear grinding method, so the time reversal cannot be realized.

For a scientific experiment to go back in time

The famous quantum physicist John Wheeler proposed a theoretical idea in 1978, known as the "delayed choice thought experiment". The "delayed choice thought experiment" is actually an improved version of the "double-slit experiment", in which light passes through a slit in the curtain wall.

When a beam of light shines through a slit onto the wall behind it, the photon appears to exhibit particle behavior. When a second slit is introduced, interference bands appear and the photons appear to be wave-like. John Wheeler suggested adding a second curtain wall with a slit behind the first curtain wall to see if the light would be stable as it passed through the two walls.

However, it seems unlikely that this experiment will be completed.

The Australian National University research team made the experiment possible with a slight alteration of John Wheeler's thinking. Instead of using photons, they took helium atoms and passed them through a grating formed by a laser beam instead of a physical curtain wall. This way, when the atom flying at high speed passes through the second barrier, researchers can see exactly what happened to it.

The researchers found that without a second grating, the atoms followed a single line and behaved like particles. But when both gratings are present, the atoms travel along multiple lines, somewhat like the way waves behave.

Before the introduction of the second grating, the researchers measured the lines of helium atoms traversing the first grating. Experiments have found that a second grating that has not yet been introduced, but which may have been introduced, has an effect on the state of the particles. This suggests that if the helium atoms do follow a particular route, the next future measurements will affect the atom's route.

Researchers believe that this suggests that future events are influencing the atom's past.

The above content reference: Encyclopedia - Time Lapse.