Can you turn back time? Let s talk about the scientific basis.

Yes. Theory: Einstein's theory of relativity.

If the time can really be reversed, where do you want to go back to when?

The jury is still out on the science.

However, Lu Xiao, according to the principle of relativity, it is possible to go back in time. The condition is to know that the so-called time brother knows that the shuttle must exceed the speed of light.

There are scientific theories that the speed of light drops dramatically in a certain environment. This may give a theoretical basis for going back in time.

Albert Einstein himself believed that the speed of light was an unsurpassable speed in the universe.

However, for decades, there have been scientists working to find faster-than-light microparticles. There is a kind called "tachyon", which is said to be faster than the speed of light.

If I could go back in time, I would most like to go back to the age of 20. I made this choice because I was in college at that age, I was at the best age, I had a carefree life, and I had a bright vision for the future.

1. At the age of 20, I am at my best age, and I want to go back to that time.

20 years old is the best age for a person, and it is the age of gold. This is the main reason why I want to return to this age. ......If Hansen talks about respecting mu and can go backwards, he will definitely want to go back to his best age to ......In the memory of Sun Ji, every day at the age of 20 was happy and sunny, so he hoped to return to this best age to enjoy the best time again.

2. I was in college at the age of 20, and it was the most carefree time.

When I was 20 years old, I was in college. ......At this time, I was in the most carefree state. ......In terms of study, I happily study various subjects and courses in the university, and every day is relaxed and happy; In life, with the help of my parents, I don't have to worry about food and clothing, and I don't need to worry about life.

Therefore, I have the best impression of this age, and if possible, I am of course willing to return to this age.

3. At the age of 20, I was full of the best vision for the future and full of hope for life.

A person's best state is not to enjoy the best life, but to be full of longing for the future and hope for life. ......When I was 20 years old, I was in such a state. ......At this age, I am studying in college, and I am in my prime and have a great future, so I am full of beautiful visions for the future and hope for life.

This state has left me with the best memories, and I really want to be able to experience that feeling again. ......Therefore, I want to go back to the age of 20 and relive the good feeling at that time.

There have been many explanations, most of which revolve around the idea that the arrow of time is essentially created by an increase in entropy. Entropy, roughly speaking, is the degree of disorder in a system.

Entropy is asymmetrical. This is the second law of thermodynamics. We know that the sum of entropy of any system that is large enough must increase over a long enough period of time - it will change from one state to one more disordered.

Let's say you fill half of the bottle with salt and then fill the other half with your hands and sell pepper. In the beginning, there were two distinct layers of things. But if you move or shake the bottle, the salt and pepper will mix and become disorderly.

This is entropy. And because it's a one-way process, many physicists believe it's what determines the direction of the arrow of time.

But this theory has two flaws: the first is that there is an upper limit to entropy - your salt and pepper shakers will eventually reach a most disordered state, which means that no matter how much you shake it, it will not mix any more. Second, in order to observe the increase in entropy, you first need to determine an initial state - the initial state of salt and pepper.

If we take our universe as an example, then we have to think about it - a highly ordered initial state is almost impossible.

If I could travel back in time, I would most like to go back to the three ages of 14, 18, and 22, because I have the least regrets among these three ages.

1. Back to my 14-year-old childhood, my cat Huanhuan is my best playmate. Every time I call it by name, it immediately runs up to me. When it first came to my house, it was a kitten, and then as time went by, it grew up and I grew up.

When I got to junior high school, I started living on campus and rarely went home. When I was 14 years old, I came home from school vacation, and I couldn't find it, so I asked my mother if it went. Mom was sad to tell me that it had gone to the cat.

It's old, it's immobile lately, and it's been lying on its stomach next to my shoes on the day it was dying, as if waiting for me to come back. I blame myself for not being with it in the end, every time I think of it, I regret it, if I can go back to this year, I want to give it a hug and let it have no regrets.

2. I went back to the age of 18 and failed the college entrance examination at the age of 18, and I was not admitted to my ideal school. At that time, I didn't know what to think, so I didn't want to repeat it, so I resolutely chose a random university to study. A few years of college time passed in a blink of an eye, and I worked directly after graduation, but after working, I realized how important a good university is.

After experiencing the experience of society, I regret more and more, why didn't I repeat it in the first place, if it wasn't for my own insistence, I might not be so hard now.

3. Returning to the 22-year-old grandma is the most painful for me, and every time there is something delicious, she will leave it to me. She is kind and simple, and always warms me with her love. But at the age of 22, my grandmother passed away, and she left me forever.

I couldn't accept this fact and collapsed for a long time. If I can go back to this year, I hope to accompany my grandmother more, I can make more delicious food for my grandmother, I want to take my grandmother to see the great landscapes of the motherland, and I will tell my grandmother every day that I love her.

So we have to cherish the time, cherish the time that passes every day, because after the time passes, it will not come back, and I hope mine will help you.

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.