After tasting a masterpiece of A Brief History of Time, I believe that everyone's vision must be broadened a lot. It is necessary to write a reading note of A Brief History of Time and make a good record. The following are my reading notes on A Brief History of Time, which I carefully arranged for you, hoping to help you.
Reading Notes on a Brief History of Time 1 In this book, Professor Hawking tries to explain advanced physics knowledge in an easy-to-understand way so that most people can understand it.
Nevertheless, this book seems a bit difficult. In this book, he leads readers to roam in the strange field of outer space, introducing distant galaxies, black holes, quarks, "tasty" particles and "spinning" particles, antimatter and "arrow of time" in a simple way, and expounding the ancient problems such as what the universe looks like, time and space, relativity and so on, so that readers can initially understand the cosmological secrets such as special relativity, time and the origin of the universe.
When reading a book, you have to admire Professor Hawking's meticulous logic, and you will find his extraordinary wisdom displayed between the lines. He can regard relativity as a ping-pong ball in the hands of a child, and vividly describe the physical law that time and space are inseparable in relativity. One of the great achievements in the book is the study of black holes. Black holes were originally a prediction put forward by Einstein in his book Relativity. He assumed that if there is a space with a very large curvature, objects will escape so fast that even light cannot escape from such a space. Then such a space can be called a "black hole".
But he thinks that since even light cannot escape from a black hole, we can't observe it. This is a very big black hole. But Hawking combined Einstein's theory of relativity with quantum theory, and proposed that a black hole is not "black", it can emit positive and negative particles, and it has a high temperature. It is difficult for us to observe it because the positive and negative particles it emits annihilate each other. Black holes radiate energy at a very high speed. When the energy is exhausted, local regions or the whole universe will collapse at a big squeezing singularity like BIGBANG, thus ending their extinction.
Professor Stephen Hawking, the author of A Brief History of Time, is such a time giant. Hawking's life is very legendary. In terms of scientific achievements, he is one of the most outstanding scientists in history. His contribution was made when he was confined to a wheelchair by Luger's disease for 20 years, which was really unprecedented. He made great contributions to astrophysics. Hawking roamed the universe with his imprisoned body and unyielding will. He challenged the real haircut with his wisdom and made great contributions to the progress of mankind.
While lamenting the massive scientific information that Professor Hawking brought me, I admire his spirit of daring to question, imagine and demonstrate. This spirit is exactly what we should focus on protecting in the process of educating and guiding students, and we must never intentionally or unintentionally stifle children's imagination and curiosity.
A Brief History of Time Reading Notes 2 During the summer vacation, I often watch the programs of the World Geographic Channel. I am full of curiosity about the vast universe and the mysterious earth. The opportunity of summer vacation is rare, so I decided to read A Brief History of Time written by Mr. Hawking under the guidance of my father. After reading it, I got a preliminary understanding of the universe and the earth and felt a lot.
A Brief History of Time is a popular science book, which is difficult for me to understand. Mr. Hawking once said that anyone who can read every sentence in the book can study for a doctorate in physics. I read with understanding. Although I have only learned a little, I have expanded my knowledge and improved my ability to find, analyze and solve problems.
This book mainly talks about the origin of the universe, the space-time of the universe and so on. Space and time in the universe are a whole. Where there is space, there is time, and where there is time, there is space. Time and space affect everything in the universe, and everything in the universe also affects time and space. The universe originated from the Big Bang. Before the Big Bang, the universe was a primitive fireball with high uniformity and constant temperature. The explosion produced the present universe, which is still expanding. Once the universe stops expanding, it will shrink and the universe will return to its original point.
Although this book is difficult to understand, it has taught us how to look at the world correctly, and let us learn to look at things from a scientific perspective and apply it to our study. Make a good study plan and use good study methods. A good study plan can achieve twice the result with half the effort. "Where there is a prophecy, it will be abolished." And good learning methods will help you take classes, study by yourself and review after class. If you can form such a good habit, it will be of great help in the future.
From this book, I learned that many great scientific advances were pursued by many great scientists with their own ideas and opinions. In learning, we should also ask questions with our own thoughts and viewpoints. We should consult our teachers more. The teacher's knowledge and experience are very rich, which is valuable to us. To become the future builder of the country, the knowledge in books is far from enough. We should also read more extracurricular books and learn more knowledge.
A Brief History of Time is a good book that makes people think and feel. I admire the author of this book, Mr. Hawking. His life is full of legends. As far as scientific achievements are concerned, he is one of the most outstanding scientists in history, and his contribution has had a far-reaching impact on human concepts. However, his contribution was made in a wheelchair, which is unprecedented-he will become impossible.
A Brief History of Time is really a good book.
Reading Notes on a Brief History of Time 3 In my spare time, I briefly read a scientific book A Brief History of Time, which is sold around the world with great interest. Its author is stephen william hawking, a famous cosmologist and theoretical physicist. This scientific work can be said to be the perfect combination of Einstein's general theory of relativity and quantum mechanics. In addition, the book also elaborates on the black hole effect, the Big Bang and the singularity of the universe.
If this book focuses on mathematical formulas, proof process and scientific terms, then I don't think it can sell well all over the world. With its popular language, humorous illustrations, powerful argumentation process and unique way of thinking, this book takes readers into the vast universe to experience the mystery on the edge of the black hole and feel the grandeur of BIGBANG, which is thought-provoking and fascinating.
The focus of A Brief History of Time is to outline the big bang theory of black holes and cosmic singularities. Starting with Einstein's theory of relativity, it supplements some deficiencies in general relativity. The author thinks that the universe started from a singularity with infinite density and infinite curvature of spacetime through the Big Bang. In the Big Bang, the temperature of matter was very high. In the next second, the temperature of the universe drops sharply to about 654.38+000 billion degrees Celsius, and it is still expanding, so that positrons and antielectrons (positively charged electrons) collide and annihilate each other, releasing a large number of light particles to maintain the balance of the universe. Later, it can have a powerful effect, so that matter keeps gathering and gathering, forming ancient planets and interstellar matter. Our earth is also formed by the accumulation of these substances.
Another great achievement in the book is the study of black holes. Black holes were originally a prediction put forward by Einstein in his book Relativity. He assumed that if there is a space with a very large curvature, objects will escape so fast that even light cannot escape from such a space. Then such a space can be called a "black hole". But he thinks that since even light cannot escape from a black hole, we can't observe it. This is a very big black hole. But Hawking combined Einstein's theory of relativity with quantum theory, and proposed that a black hole is not "black", it can emit positive and negative particles, and it has this high temperature. It is difficult for us to observe it because the positive and negative particles it emits annihilate each other. Black holes radiate energy at a very high speed. When the energy is exhausted, they will explode violently from a singularity like BIGBANG and disappear into the universe.
From this book, I not only have unique knowledge of cosmic physics, but also read an indomitable and optimistic attitude towards life. As we all know, Hawking was paralyzed when he published this book, and only three fingers could move. Under such conditions, he used his brain full of wisdom and knowledge to think about the universe and challenge the truth. In the end, he successfully published this masterpiece that stands proudly in the forest of scientific literature. Hawking's persistent pursuit of truth is a supreme spirit and an immortal glory that everyone should look forward to.
Since ancient times, people have been puzzled by the mystery of the sky above us. Regarding the origin of the world, China has the theory that Pangu created the world, while the western world thinks that God created the world. As a result, churches can be seen in the streets of Europe and America, and most people believe in God. Unfortunately, the Hubble telescope has surveyed the space around the earth within 20 billion light years, but there is no shadow of God. Although these two views are obviously wrong, they also reflect one side of human thinking. When they really can't think of it, they make up things like Pangu and God to defend themselves.
In this book, Hawking tries to explain profound physical knowledge in an easy-to-understand way so that most people can understand it. Nevertheless, this book seems to have the necessary difficulty, even more difficult to understand without the necessary physical foundation. In fact, the biggest reason that hinders our understanding is that we usually live in a macro-low-speed environment and can't understand the matter and its motion state in the universe or micro. Just like Einstein's theory of relativity, it is beneficial when the speed of matter is close to the speed of light, but we can't come into contact with this situation in our life, so unless we have super imagination potential and abstract analysis potential, it is actually difficult to understand. So I will look at this book from an amateur angle, just out of interest and curiosity. Professor Hawking sticks to his Big Bang view on the origin of the universe. That is, the universe is an infinitesimal singularity, so its density is infinite. Suddenly broke out and dispersed, and the temperature produced by the explosion was extremely high. Since then, the universe has been expanding. Until this moment, the moment of explosion is the beginning of time. In the process of expansion, some gases and dust gradually cooled and gathered together, forming various planets, and the face of the universe gradually became clear. There is a trouble here, that is, the big bang is the beginning of time. So before the big bang, what was that singularity? Is there no time span? Maybe "before" is not appropriate. After all, what can we have before we start? But where does the starting point come from? It seems to be caught in an infinite loop, no matter
No matter what source you are talking about, you can doubt the source of this source. The best way to end this endless doubt is to believe that the earliest one is not "before that". So many people believe in God, and Hawking also believes in that "singularity". I don't understand. So many people believe in God, and it is estimated that there is no credibility. The big bang theory is just a guess and has not been confirmed. Facts have proved that having no faith is indeed a very painful thing, and the brain is in a mess and cannot be saved.
The above questions are really torturous. Professor Hawking himself was vague, so I skipped it. The following is the relationship between time, space and matter. In the course of Marxist philosophy principles in freshman year, Marx simply said that movement is the fundamental attribute of matter, while time and space are the manifestations of material movement, and time is one-dimensional. Hawking and a large number of physicists have different views. First of all, the relationship between matter and space is subtle-matter is a distorted space. But what is space? Is it vacuum? But it's meaningless.-meaningless. At present, the scientific community is still trying to find the most basic things that make up matter, which are basically inseparable. Unfortunately, quarks have some obstacles, because quarks have been a guess and have not been confirmed for decades. Due to the limitation of experimental equipment and some theoretical defects, the observation of microscopic particles has been hindered, and it is impossible to accurately measure their motion state. In this way, scientists can only think hard all day and try to find a brand-new theory, but in these decades, there has never been any substantial progress.
The most thought-provoking thing about this book is its view of time and space. In the theory of relativity, absolute space and absolute time do not exist. At this time, most people can understand the viewpoint of absolute motion, that is to say, stillness is relative and there is no absolute stillness. Due to the lack of absolute static standards, we can't determine whether things happening at different times are in the same spatial position. Many people may think this is simple-the same place is easy to determine. But when ordinary people say the same place, they mean the relative position on the current planet, which puts us in the universe. Our position has been changing, and there have never been two overlapping points. Because the earth itself is in constant motion, this is easy to understand. But time has also become relative, which is hard to understand. In our daily life, the passage of time seems unchangeable, and we walk according to our own inherent laws and are not influenced by us. Because of this, we always use time to record what has happened and regard time as a fixed ruler, so that we will have no difficulty in communicating under such a unified ruler. But Einstein's theory of relativity ruthlessly pointed out that there is no absolute time, and time is only an accessory of material movement. What we usually call time seems to have no direction, illusory and invisible. In relativity, time is one-dimensional, and its direction is the direction of the expansion of the universe. Our universe is still expanding.
I still can't understand the relativity of time. Hawking then introduced the black hole. I thought I knew a lot about black holes, because I often saw explanations about black holes in popular science programs. Black holes are formed by the collapse of aging stars. Stars rely on the fusion of internal hydrogen atoms to generate energy, release light and heat, and the sun is like this. After the internal raw materials are used up, they will collapse, that is, shrink to a point. Ten minutes after this point, its density will tend to infinity, and its gravity will also become infinity. Because of gravity, nothing can escape, including light. As we all know, people can see things because the light reflected by that thing enters the human eye. There will be no light there for a while, so it is impossible for humans to really see black holes, but they can be inferred according to the motion law of visible stars. I didn't think it was a big deal. You can't see it if you can't see it. But Professor Hawking added that time has an end, similar to a singularity.
I think most young people of this age have thought about what the universe is, where it comes from, what the past is, where the future is, and whether fate has already been decided. Sometimes, I am infinitely sad because I can't think of it. Really, when you find that you don't understand where you are and why you exist, you will definitely feel a little lonely, even sad. I used to deliberately avoid these questions. Thinking too much may affect my normal life. Sometimes when you watch the news, you will find that some people have mental problems because of these problems. I chose to read this book because I want to solve the lingering doubts. But this book only says some conjectures and puzzling theories. At the moment, I can know a little about those who believe in God or other religions. After all, there is no belief in my heart that will make people lose their way and get lost on the road of life. I just hope there is a convincing statement that I can believe. I am not a complete materialist. No one can prove who is the master of the world. Although I can be sure that both God and Buddha are nonsense, I will not be superstitious about activities related to God. Because I don't know how many times I have scolded those immortals, but they are still alive and well at the moment. Those gods can't cure ordinary people like me. To some extent, I consider myself a fatalist. Because there are always too many coincidences in this world, for example, my existence is wonderful. Imagine how many molecular atoms there are in the universe, but there must be so many atoms that make up me. Having said that, I won't use fate as an excuse. Many people who fail always attribute their reasons to fate. I wonder how an ordinary person can clearly understand his own destiny, and the answer will not be revealed until the last moment.
Just because a person fails temporarily doesn't mean that he can't succeed. Many people will say that fate is in their own hands. Have they ever wondered where this attitude comes from and whether their birth is in their own hands? You may say that people can change their destiny through hard work the day after tomorrow, but where does this attitude come from? You can't answer.
Notes on a Brief History of Time 5 Why do we always remember the past instead of the future, and why does time always move forward? As Mr. Zhu Ziqing asked in "Hurry", "You are smart. Tell me, why are our days gone forever? Stephen Hawking answered this question in A Brief History of Time: "There are at least three different time arrows: the first is the thermodynamic time arrow ... and then the psychological time arrow, which is the direction in which we feel that time has passed, in which we can remember the past instead of the future ... Our subjective feelings or psychological time arrows about the direction of time are determined by the thermodynamic time arrow in our minds. When we are slower than time, we move backward relative to time, and we can go back in time. In other words, all objects are at the same speed as time relative to the universe, and everything in the universe advances with time. If we go beyond the speed of time to time, without space, time and everything, it will still be chaotic, where we can't see anything, and we can't exist there. "
First, a book, a picture of truth.
I used my holiday to read a science book, A Brief History of Time, which sold well all over the world. Its author is a famous cosmologist and theoretical physicist-Stephen? William? Hawking. This scientific work is the most perfect work that combines Einstein's general theory of relativity with quantum mechanics. With its popular language, humorous illustrations, powerful argumentation process and unique way of thinking, this book takes me into the vast universe, to experience the mystery on the edge of the black hole, and to feel the grandeur of BIGBANG, which is thought-provoking and fascinating. The focus of A Brief History of Time is to outline the big bang theory of black holes and cosmic singularities. Starting with Einstein's theory of relativity, it supplements some deficiencies in general relativity. The author thinks that the universe started from a singularity with infinite density and infinite curvature of spacetime through the Big Bang. In the Big Bang, the temperature of matter was very high. In the next second, the temperature of the universe drops sharply to about 654.38+000 billion degrees Celsius, and it is still expanding, so that positrons and antielectrons (positively charged electrons) collide and annihilate each other, releasing a large number of light particles to maintain the balance of the universe. Later, it can have a powerful effect, so that matter keeps gathering and gathering, forming ancient planets and interstellar matter. Our earth is also formed by the accumulation of these substances.
Another great achievement in the book is the study of black holes. Black holes were originally a prediction put forward by Einstein in his book Relativity. He assumed that if there is a space with a very large curvature, objects will escape so fast that even light cannot escape from such a space. Then such a space can be called a "black hole". But he thinks that since even light cannot escape from a black hole, we can't observe it. This is a very big black hole. But Hawking combined Einstein's theory of relativity with quantum theory, and proposed that a black hole is not "black", it can emit positive and negative particles, and it has this high temperature. It is difficult for us to observe it because the positive and negative particles it emits annihilate each other. Black holes radiate energy at a very high speed. When the energy is exhausted, they will explode violently from a singularity like BIGBANG and disappear into the universe.
Stephen Hawking expounded the most profound theory in the world with simple language, humorous tone and simple and vivid examples, and expounded the development of space-time view theory in modern physics. From his narration, I saw the vastness of the universe we live in, and the vastness of space corresponds to the long time. In such a time and space, I feel like a drop in the ocean, and the smallness of human beings is in sharp contrast with the vastness of the universe.
Second, a character and an inspiring story.
From this book, I not only read the knowledge of cosmic physics, but also read an indomitable and optimistic attitude towards life. Hawking, his life experience and his scientific contribution are also a miracle. He was diagnosed as a frozen man at the age of 20, and the doctor even predicted that he had only two years to live, but he created a miracle. (It is understood that "gradual freezing disease" is the common name of a group of motor neuron diseases (referred to as M.N.D), and the main type is amyotrophic lateral sclerosis (referred to as A.L.S), so it is commonly known as "gradual freezing disease" because its characteristic is that muscles gradually atrophy and the body seems to be gradually frozen. Because there is no specific medicine at present, it ranks as the five major chronic diseases in the world along with cancer, AIDS and other diseases. It is such a person who, sitting in a wheelchair all the year round, relies on a computer speech synthesizer to "talk" with people at the speed of one tenth of that of normal people, but like other scientists, he tells others with his own experience that persistent exploration spirit is the greatest motivation in life. In my heart, apart from the washing and shock brought by this book, the only thing left is the worship and admiration for this great soul! Hawking is far away from us, but his spirit is close to us.
This book teaches us how to look at the world and all kinds of things in life correctly. We should look at things from a scientific perspective, instead of blindly believing in superstitions and other fallacies when we encounter something difficult to understand. The existence of everything has its meaning. We should look at things from a scientific perspective and study in a scientific way. Every major discovery in the history of science is discovered by scientists through bold assumptions and careful argumentation, so we should also implement this way of thinking in our study, not only in the formulation of learning plans, but also in the application of learning methods. We should apply Hawking's spirit to our work and study. As a student, we should constantly enrich our knowledge. A comprehensive and rigorous study plan is very reasonable for the study schedule and can achieve twice the result with half the effort. Isn't there a proverb, "everything is done in advance, and it will be abolished if it is not planned." And good learning methods will help you to attend classes, study by yourself and review after class, which are very important for college students. More importantly, if we can form such good habits, it will be of great help to our future work. The future society will be a talent display platform with rapid development and extensive information exchange, and rigorous thinking logic and scientific ways of doing things are two magic weapons, which can help you stand out, show yourself on the stage of life and realize your life value.
After reading this book, I benefited a lot. I have learned far more than that, and more essence needs further reading and exploration. Finally, I quote a sentence from Newton as the end: "I don't know what the world thinks of me." I just feel like a child playing with water by the sea, and I am happy to see beautiful shells occasionally. But in the face of the vast sea of truth, I am still at a loss. "