Will time go back, will time go back

At one point, scientists studied the possibility of transcending the speed of light, fantasizing about one day being able to build rockets that move faster than the speed of light. In this way, people can catch up with the light signals emitted on the earth by simply riding this rocket and thus see what happened on the earth in the past. This means that at the speed of light, time will be reversed, and people will pass tomorrow, today, and then yesterday.

In other words, a person becomes an old man first, then a young man, a teenager, and then a baby. This phenomenon is unimaginable for people living in our physical world.

As you know, if a missile is launched at the speed of a jet fighter flying at the speed of sound, and its speed relative to the aircraft is also comparable to the speed of light, then, in the eyes of people on the ground, the missile will fly forward at twice the speed of sound. This is a conclusion based on the synthetic formula of the velocity of classical physics. But if a beam of light is fired at a rocket traveling at the speed of light, will that light travel forward twice the speed of light for an observer on Earth?

This question was a headache for scientists at one time. It was not until the end of the last century, when American scientists Michael Sun and Morey collaborated on a famous experiment that gave a largely clear answer to this question. They confirmed such an important conclusion:

The speed of light in a vacuum never changes, regardless of the observation system in which it is measured, and whether or not the light source emitting the speed of light is in motion. This shows that the speed of light is the "absolute champion" of nature as we know it today, and it is the limit of movement. Therefore, time is never turned back.

You can't turn back time, you can only see the past at most, but you can't change it!

People use other methods to turn back time.

There is no such thing except for black holes

It is up to future generations to study the matter of turning back time.

Even if you turn back time, it doesn't have any effect on reality, and you can't feel that time has gone backwards.

If I were to go back in time, here are a few important pieces of advice I would like to give to myself when I first entered university:

1.Keep an open mind and a positive attitude: Entering university is a new stage full of opportunities and challenges.

I want to tell myself to keep an open mind and dare to try new things and reach different people. Maintain a positive mindset, have the courage to face difficulties and setbacks, believe in your abilities and keep trying.

2.Cherish time and opportunities: University life is full of colorful activities and learning opportunities.

I would like to remind myself to cherish my time, plan my study and life reasonably, and not waste my precious university time. Seize various opportunities to participate in extracurricular activities, club organizations, internship practices, etc., broaden your horizons and interpersonal network, and cultivate all-round development ability and quality.

3.Establish good study habits: Studying in college will be more difficult and stressful, and I want to say to myself to establish good study habits.

Arrange study time reasonably, do a good job of previewing and reviewing the course, actively participate in class discussions and experimental practice, and improve your learning effect and ability. At the same time, it is necessary to pay attention to cultivating the ability of independent learning and independent thinking, and master the skills of information retrieval and scientific writing.

4.Develop hobbies and social relationships: College is not only a place to study, but also an opportunity to develop personal interests and hobbies.

I would like to say to myself that I want to actively participate in campus activities, club organizations, and volunteer services to develop my hobbies and enrich my university life. At the same time, it is necessary to take the initiative to meet new people, establish good social relationships, and expand network resources and interpersonal skills.

5.Seek support and help: During my time at university, I wanted to tell myself that I was shy and isolated, and that I had the courage to seek support and help.

Both the school and society have a variety of resources and services that can help students solve problems and face difficulties. Actively communicate with teachers, counselors, and classmates to seek their guidance and advice. In addition, take advantage of resources such as the Orange Good Library, Academic Counseling Center, and Psychological Counseling Services to pay attention to your physical and mental health.

These are some of the most important pieces of advice I would like to give to myself when I first enter university. University is a precious stage in your life, and I hope you will cherish this time, strive to grow and explore, and lay a solid foundation for future development.