Interesting story of physicist, 500 words.

Physics is a natural subject with a long history. With the development of science and technology and the progress of society, physics has penetrated into all fields of human life. For example, just looking for optical knowledge in the car has the following points:

1. The rearview mirror outside the driver's cab is convex.

By using the divergent function of convex mirror to light and the characteristics of upright, narrow and virtual image, the objects you see are small and the observation range is wider, thus ensuring driving safety.

2. The reflector of automobile headlights is a concave mirror.

It is made by using the property that concave mirror can reflect the light from the light source placed at its focus into parallel light.

Car headlights should always be equipped with glass lampshades with horizontal and vertical stripes.

Car headlights consists of a light bulb, a reflector and a front glass cover. According to the knowledge of lens and prism, car headlights glass cover is equivalent to the combination of lens and prism. When driving at night, drivers should not only see the road ahead, but also see the fixers, road signs, forks and so on. The lens and prism refract the light, so the lampshade diffuses the light to the required direction according to the actual needs, so that the light illuminates the road in front of the car and the roadside scenery evenly and softly. At the same time, this astigmatism lampshade can slightly refract some light to illuminate road signs and milestones, thus ensuring driving safety.

After the car is fitted with brown glass, it is difficult for pedestrians to see the faces of people in the car.

The tawny glass can reflect some light and absorb some light, so the light penetrating into the car is very weak. In order to see the passenger's face clearly, it is necessary to reflect enough light from the face and transmit it to the outside of the glass. Because the light inside the car is weak and there is not enough light to transmit, it is difficult to see the passenger's face clearly.

(2) Write an experimental discussion on a physical phenomenon in life (500 words).

Draw water with a sieve.

-such as the tension of water molecules.

As the saying goes, "draw water with a sieve". In fact, if you look carefully, you will find that the bamboo basket draws water with nothing: there are countless water films at the bottom and around the bamboo basket. What is the reason? We must start with intermolecular forces.

As we know, all matter is made up of molecules, and the molecules that make up matter are not only moving endlessly and irregularly, but also have both interactive attraction and mutually repulsive force between molecules. Under normal circumstances, the attraction between molecules is equal to repulsion. If the distance d between molecules is the equilibrium distance at this time, then when the distance between molecules is slightly greater than the equilibrium distance, the intermolecular force will show as attraction (if it is greater than 10 times the molecular diameter, there is almost no interaction between molecules). When the distance between molecules is less than the equilibrium distance, the force between molecules shows repulsive attraction. When the bamboo basket is immersed in water, due to the attraction of bamboo stick molecules to water molecules, when the bamboo basket is lifted, the distance between water molecules in the gap becomes larger, and the force between molecules shows attraction, thus forming countless water films.

In fact, any water surface has a water film. This is because some fast-moving molecules on the water surface keep running into the air (that is, water evaporates), which makes the distance between water molecules larger, and the attraction between molecules is obviously greater than the repulsion, thus forming the so-called tension, which makes the water surface look like a thin and elastic "skin". This is one of the reasons why many light insects can walk freely on the water. To say that the surface tension here is really not small, enough to make some light plastic rice baskets float on the water without sinking.

But if a part of the water film is destroyed, other parts will move under the action of gravity. For example, use a wooden pencil to cut open the core to make a boat, insert wax oil into the small hole drilled behind the boat, put the boat on the water, and the boat will move forward. This is because the wax oil in contact with water destroys the tension on the water surface, which suddenly reduces the tension on this part of the water surface, so the ship moves in the direction of greater tension. In addition, due to diffusion, wax oil molecules shoot at water at a certain speed, because the forces are mutual, which also produces a force to push the ship forward.

You see, how wonderful the world is, drawing water with a sieve. It is really important to pay attention to physics everywhere. Let's enjoy this beautiful world with a scientific eye!

The story of Qian Xuesen (about 500 words)

1 1 year 65438+February1day, Hangzhou, Zhejiang,1August, 1959, joined China, Ph.D.

1929 to 1934 studied in department of mechanical engineering, Shanghai Jiaotong University. After graduation, I applied for studying in Tsinghua University at public expense. After entering the school, I worked as an intern at Hangzhou Jianqiao Airport. 1935 to 1939 studied in the department of aeronautical engineering of MIT and obtained a master's degree. 1936- 1939 studied in the department of aeronautics and mathematics of California Institute of Technology, USA, and obtained a doctorate. 1939- 1943, researcher, Department of Aeronautics, California Institute of Technology. 1943 to 1945 was an assistant professor in the department of aeronautics, California Institute of Technology (1940 to 1945 was a communication researcher in Chengdu Institute of Aeronautics, Sichuan). 1945- 1946, associate professor, Department of Aviation, California Institute of Technology. 1946- 1949, associate professor and professor of aerodynamics, Department of Aeronautics, Massachusetts Institute of Technology. 1949- 1955, Director and Professor of Jet Propulsion Center of California Institute of Technology.

1955 returned to China. 1955 to 1964, director and researcher of the Institute of Mechanics, Chinese Academy of Sciences, and director of the Fifth Institute of the Ministry of National Defense. 1965 to 1970 served as deputy minister of the seventh Ministry of Machinery Industry. 1970 to 1982 served as deputy director of the science and technology Committee of the commission of science, technology and industry for national defense and vice chairman of the China association for science and technology. He has served as the first and second director of China Automation Society, honorary president of China Aerospace Society, China theoretical and applied mechanics Society and China Systems Engineering Society, executive director of the Presidium of China Academy of Sciences, and member of the Department of Mathematics and Physics. 1986 to 199 1 May, served as the chairman of the third National Committee of China Association for Science and Technology. 1991may was elected honorary chairman of China association for science and technology at the fourth national congress. 1April, 1992, was appointed honorary chairman of the Presidium of China Academy of Sciences. /kloc-0 was elected as an academician of China Academy of Engineering in June, 1994.

He is an alternate member of the 9th to 12th Central Committee and vice chairman of the 6th, 7th and 8th China People's Political Consultative Conference.

China is a pioneer and outstanding representative of space science and technology, and is known as "the father of China's space flight" and "the king of rockets". During my study and research in the United States, I cooperated with others to complete the summary and preliminary analysis of long-range rockets, laying the theoretical foundation for surface-to-surface missiles and sounding rockets. The hypersonic flow theory put forward by others laid the foundation for the development of aerodynamics. At the beginning of 1956, the Opinions on Establishing China's National Defense Aviation Industry was submitted to the Central Committee of * * * and the State Council. In the same year, according to his suggestion, the State Council and the Central Military Commission established the Aviation Industry Committee, the leading body of missile and aviation research, and was appointed as a member. From 65438 to 0956, he was appointed to set up the first rocket and missile research institute in China, the Fifth Research Institute of the Ministry of National Defense, and served as the first president. He presided over the completion of the plan of "establishing jet and rocket technology", participated in the development of short-range missiles, medium-and short-range missiles and China's first artificial earth satellite, directly led the "two-bomb combination" test of medium-and short-range missiles carrying atomic bombs, participated in the formulation of the "two-bomb combination" test of short-range missiles carrying atomic bombs in China, participated in the formulation of the development plan of China's first interstellar aviation, and developed and established engineering cybernetics and systematics. He has made pioneering contributions in the fields of aerodynamics, aviation engineering, jet propulsion, engineering cybernetics, physical mechanics and other technical sciences. He is the founder and advocate of the theoretical and applied research of modern mechanics and system engineering in China.

1957 won the first prize of natural science of China Academy of Sciences. 1979 won the outstanding alumni award of California Institute of Technology. 1985 won the national special prize for scientific and technological progress. 1989 was awarded "Rockwell Medal", "World-class Science and Technology and Engineering Celebrity" and honorary member of International Polytechnic. 199 1 year 10 was awarded the honorary title of "National Outstanding Contribution Scientist" and the first-class hero model medal by the State Council and the Central Military Commission. 1995 65438+ 10 won the "1994 ho leung ho lee foundation Excellence Award" in October. 1999, the Central Committee, the State Council and the Central Military Commission decided to award him the "Two Bombs and One Satellite Meritorious Medal". In June 2006, he won the "highest honor award for China's space industry in 50 years".

(4) The physics test paper of Senior Two is about 500 words.

Physics is a subject based on observation and experiment. In teaching, consciously guide students to contact with real life and analyze physical phenomena; Making use of things around you and doing physics experiments can stimulate students' interest in learning and deepen their experience. This paper introduces a group of physical phenomena and experiments related to eggs.

1, liquid evaporates and absorbs heat.

Experiment: Just boiled eggs are fished out of the pot and taken directly by hand. Although they are hot, they are passable. After a while, the water film on the eggshell dried up and it felt hotter than when it was first caught.

Analysis: Because the newly caught eggshell is attached with a layer of water film, at the beginning, the water film evaporates and absorbs heat, which makes the temperature of the eggshell drop, so it doesn't feel very hot. After some time, the water film evaporated. The heat transferred inside the egg makes the temperature of the eggshell rise again, so it feels hotter.

2. The essence of thermal expansion and cold contraction

Experiment: Soak the boiled eggs in cold water immediately and take them out after cooling completely.

Analysis: First of all, when an egg is soaked in cold water, the eggshell contracts directly when it is cold, while the temperature of the protein drops very little and the contraction is small. At this time, the eggshell is mainly contracted. Secondly, due to the different properties of different substances, when the whole egg is completely cooled, the protein shrinkage rate of loose tissue is greater than that of eggshells, which leads to the separation of eggshells and makes it easier to peel eggshells.

3. Verify the existence of atmospheric pressure

Experiment: Choose a bottle slightly smaller than an egg and heat a layer of sand at the bottom of the bottle. First, light a ball of alcohol cotton and put it in the bottle. Then, block the bottle mouth with the small head of the shelled egg facing down. After the flame went out, the egg was slowly "swallowed" by the bottle into its belly.

Analysis: the burning of alcohol cotton makes the gas in the bottle expand by heating, and some gas is discharged. When the egg blocks the bottle mouth and the flame goes out, the pressure of the gas in the bottle becomes lower than the atmospheric pressure outside the bottle due to the temperature drop. Under the action of atmospheric pressure, eggs with certain elasticity are pressed into the bottle.

4. Floating and sinking phenomenon

Experiment: Immerse an eggshell in a large-caliber glass filled with clear water. After releasing my hand, I found that the egg slowly sank to the bottom of the cup. Take out the eggs and add salt to clear water to prepare a high-concentration salt solution. Then immerse the egg in the salt solution, and after releasing the hand, the egg slowly floats.

Analysis: The ups and downs of an object depend on the relationship between gravity and buoyancy. The volume of an object immersed in a liquid is the volume of the liquid it displaces. According to Archimedes principle, the relationship between object density and liquid density can correspond to the relationship between gravity and buoyancy. Because the density of eggs is slightly higher than that of clear water, when eggs are immersed in clear water, gravity is greater than buoyancy, so eggs will sink. When immersed in salt water, because the density of salt water is greater than that of eggs and gravity is less than buoyancy, eggs will float.

5, inertia, friction and resistance phenomenon

Experiment: Choose a raw egg and a cooked egg with similar appearance and put them on a horizontal table. Rotate them in the same place with the same force. What can spin quickly is cooked eggs, and what stops after a few turns slowly is raw eggs.

Analysis: There is liquid egg white in the shell of raw eggs. When the external force acts on the eggshell and rotates, the egg white remains still due to inertia, so there is friction resistance between it and the eggshell, which makes the whole egg only rotate slowly. The egg white in the cooked egg has solidified into protein, and the whole egg can rotate quickly when it rotates under the action of external force.

6, the stable balance of the object

Experiment: Choose a raw egg, open a hole at the end of the small head, and clean the egg white and yolk in the eggshell. Slide the weight along the hole. Take the big end of the eggshell as the bottom and hold the eggshell. Light a candle, drip candle oil, and seal the heavy object at the bottom of the eggshell. Candle oil can be sealed to about a quarter of the height of the whole eggshell. After the prepared eggshell is pushed down, the eggshell can stand up automatically. Be a "tumbler".

Analysis: The weight of the seal at the bottom of the empty eggshell and candle oil make the center of gravity of the whole egg close to the bottom of the eggshell. The lower the center of gravity, the better the stability. When the eggshell tilts away from the equilibrium position, the center of gravity of the egg rises. Because the bottom of the eggshell is spherical, the egg body returns to its original equilibrium position under its own gravity.

7, molecular movement phenomenon

Experiment: A salted egg can be made by burying an egg with a complete shell in salt for a period of time. Although the eggshell is still intact, even the yolk inside has become salty.

Analysis: Because there are gaps between the molecules of the substance, the molecules keep moving irregularly, and the salt molecules diffuse into the egg yolk, making the egg yolk salty.

Education Resource Network has collected a group of physical phenomena and experiments related to eggs.

5] 500-word physics common sense paper.

Seismophysics

Earthquakes were called "Tu Niu turned over" in ancient times. "Tu Niu was also a fierce beast in ancient times. He was born with the power of heaven, earth and five elements. When he moved, the mountains and rivers turned upside down, and Gan Kun turned upside down." At that time, people thought that this monster named "Ground Bull" turned over and caused the earthquake. Now, people have known that the cause of earthquakes is plate movement inside the earth's crust. Earthquakes will be accompanied by many physical phenomena, and you must be interested to know something about them.

First, shear waves and longitudinal waves

When an earthquake comes, people will first feel shaking back and forth, and then they will be bumped up and down. This is because earthquakes can produce both shear waves and longitudinal waves, but longitudinal waves travel faster. Shear wave refers to the wave whose vibration direction is perpendicular to the propagation direction; Longitudinal wave refers to the wave whose vibration direction and propagation direction are in a straight line. If both the shear wave and the longitudinal wave propagate along the surface, the longitudinal wave vibrates back and forth and the shear wave vibrates up and down. Using this feature, people can quickly determine the location of the earthquake.

For example, in an earthquake, residents in a certain place first feel shaking from side to side, and then start shaking up and down after 10 seconds. It is known that the propagation speed of longitudinal wave is 5 km/s and that of shear wave is 3 km/s, so how far is the source from the place?

Suppose: this place is s kilometers away from the source.

The solution is s = 18.75km.

Second, * * * vibration.

When the earthquake comes, some buildings in the same place have a large vibration amplitude, while others have a small vibration amplitude. This is a phenomenon in physics called * * * vibration. Every object has its own frequency, which is determined by its length, shape and material. Buildings also have their natural frequencies. When an earthquake occurs, if the natural frequency of a building is just close to the frequency of this seismic wave, its vibration will be the strongest.

For example, the natural frequency of a building with steel-concrete structure is directly proportional to the square of its height, and the proportional coefficient is 0.5. The frequency of seismic waves is 50 Hz. At what height did the reinforced concrete building vibrate the most in this earthquake?

Let the building height be h and the natural frequency be f.

The relationship between them is: f = 0.5h2

50 = 0.5h2

Solution: h = 10 meter

Third, the physical explanation of natural phenomena before the earthquake.

Every earthquake takes a long time to develop. Only when the local lower fault is twisted and rubbed to a certain extent and ready to go, will there be a full-scale outbreak of the earth shaking and roaring. Subtle changes have taken place in the crust before the earthquake, and the heat generated by friction between faults is released to the surface, which will cause climate anomalies in some areas before the earthquake.

According to historical records: 1925 Dali earthquake in Yunnan, before the earthquake, "it didn't rain for a long time, the night was not cold, and it didn't show in the morning";

1503 Jiangsu Songjiang earthquake was "as hot as fire" before the earthquake.

Geothermal energy is released into the air, causing changes in atmospheric temperature, and sometimes some unique clouds are formed in the air. This kind of cloud is a unique phenomenon before the earthquake, so people named it earthquake cloud.

On May 27th, Huang Kaiyun, a geography teacher at Hanyin Middle School, found three finger-shaped clouds in the sky in the direction of Hanzhong, and introduced them to many colleagues around him (we were there at that time), and predicted that there would be an earthquake. Sure enough, just two hours later, at 16: 37 pm, another aftershock of magnitude 5.7 occurred in ningqiang county.

4. Physical explanation of abnormal animal reaction before and after the earthquake.

Before and after the earthquake, some creatures, such as poultry, toads, ants, snakes and so on. , there will be abnormal reaction, scurrying about, mass migration. What happens before the earthquake is called the pre-earthquake effect, and what happens after the earthquake is called the post-earthquake effect.

Our people have summed up the following experiences in their long-term work and life:

Cattle, horses, mules and sheep don't enter the circle, and pigs don't eat dogs and bite people.

Ducks don't go into the water and make noise on the shore, but chickens fly up the tree and scream loudly.

The snake got out of the hole in the ice and snow, and a large number of toads moved away.

The rabbit jumped and bumped, and the fish jumped in panic.

Bees move noisily, but pigeons fly back to their nests in fear.

There are many reasons for the abnormal behavior of animals before the earthquake, which need to be studied. One explanation is that animals perceive infrasound waves produced by earthquakes.

Disruptive activities such as earthquake, volcanic eruption, storm, wave impact, artillery firing and thermonuclear explosion will all produce infrasound. So infrasound waves are also called death waves. Its frequency is less than 20 Hz, which is beyond the hearing range of human ears. People can't hear it, but some animals can feel it.

For example,1insects and butterflies were found in the severe winter before the earthquake of magnitude 7.3 in Haicheng, Liaoning Province on February 4, 975.

Here, thank you.

[6] Write a lively and interesting 500-word composition in physics class. The physics teacher is interesting and works hard.

In the second day of junior high school, it is natural to add a new course-physics. Our whole class is looking forward to this mysterious teacher coming to class to see who she is.

The physics class began and the teacher almost came in. My deskmate poked me with his elbow, and I quickly took my eyes off my physics book. "Beauty teacher!" My deskmate whispered and I nodded subconsciously. The physics teacher is a petite young woman with short straight hair, slightly tilted hair tail and delicate cheeks. I pay more attention to her dress, but I don't remember it for a month. She taught us for two months, until one day, my deskmate said to me in surprise, "Look, the physics teacher finally wore the same clothes today!" " "I immediately face three horizontal lines,-_-|||.

What's the atmosphere in her class? If Chinese teachers and English teachers are relaxed and lively in class, and math teachers and political teachers are serious and stuffy in class, then the depressed atmosphere in her class will make you afraid to catch your breath, for fear that you will be "strangled" in the early stage.

The first 30 seconds of my deskmate's physics class is to shout "Wei Lili is coming!" " "This shout, the scene of our class is spectacular: the boys who are skipping immediately rushed back to their seats like arrows, and the girls kept calling Wei Lili. At this time, the ping-pong sound of hitting the table and moving the bench stopped the passing students to watch. The physics student representative of a class came to the stage with a physics book and read it aloud in 3 seconds. Five seconds later, the whole class returned to calm, and there was a burst of reading in the classroom, while my deskmate and I were talking and laughing under the cover of books.

How's it going? I really want to see the style of the physics teacher! Since we are so afraid of her, is she as beautiful as I said? It's up to you to explore.

┏ (^ω^)=

The life story of a physicist was about 500 words.

newton

Newton is a famous British physicist. Mathematicians and astronomers. 16421February 25th (which happened to be the Christmas day when another great physicist Galileo died), he was born in a farmer's family in Woolsop, Lincolnshire, England.

Newton's father died two months before he was born, and he was born in this world less than a month ago. It weighs only three pounds. His mother sighed and said, "well, such a small guy, I can almost put him in a cup!" " "Adults worry that he will be difficult to survive. Surprisingly, this weak life survived tenaciously. Young Newton was raised by his grandmother after he was two years old, and soon went to school in the countryside. He is sickly and shy. Academic performance at the bottom of the class, often bullied by naughty classmates. But Newton was strong-willed and indomitable. It is said that Newton, a naughty great dynasty, had excellent lessons and once got a foot in the stomach. Newton was forced to summon up courage to compete with the bully. Newton made up his mind that he must surpass him in his lessons. Newton warned himself: "No matter what you do, as long as you are willing to work hard, you will not fail.". "After studying hard, Newton jumped to the top of the class. Newton entered Kings Middle School at the age of twelve. At that time, he liked to make toys, kites and waterwheels. Through ingenuity and hard work, the kite he made really flies higher than the shop; He made an exquisite windmill, in which a mouse named "Mouse Run the Mill" was cleverly put, and even adults were full of praise. 1656, Newton's stepfather died, so he stopped studying and returned to Walkamp with his family. In order to alleviate family difficulties, mother asked Newton to do some farm work, herd sheep and do some shopping. But Newton was fascinated by learning, reading while herding sheep. Sheep don't know when to eat their neighbors' crops. Reading while shopping often leads to nothing being bought back. 1One day in September, 658, 16-year-old Newton did a scientific experiment: that day, the wind was blowing hard, sand and stones were flying, and others were hiding at home. Newton was the only one who ran back and forth on the road, moving forward with the wind and walking against the wind for a while. It turned out that he was testing the speed difference between the wind and the wind and wanted to calculate the size of the wind.

Newton's studious spirit in his youth finally touched his mother and uncle. 166 1 year, they sent Newton to Trinity College, Cambridge University. Two years later, Trinity College founded the Lucas Lecture on Natural Science, which included geography and physics. Astronomy and mathematics. The professor of this lecture is the famous mathematician Barro (1630- 1677). Newton liked these courses very much and studied them hungrily. Stand out quickly. Professor Barrow is a versatile "Bole". Seeing Newton's extraordinary talent, he instructed him to study Kepler's optics and Euclid's geometric elements. 65438-0665, graduated from Newton University, and stayed in school to do research. This summer, there was a plague in London, and Cambridge University closed classes in autumn because it was close to the epidemic area. Newton temporarily left Cambridge and returned to Walsop, where he stayed for eighteen months.

There is always a silver lining behind the dark clouds. The 18 months after Newton came home was the most productive period in his life. In his own words: "At the beginning of 1665, I found ... the law of simplifying binomial of any index into series (binomial theorem). In May of the same year, I discovered the tangent method. The direct flow method (differential calculus) was discovered in 1 1 month. The color theory was discovered in January of the following year. In May, I began to study the inverse operation (integration) of the flow number method. The same year. I began to think about how to extend gravity to the moon's orbit ... "

After the plague, Newton returned to Cambridge University. 1668, obtained a master's degree. 1669, Professor Barrow actively recommended Newton as "Lucas Lecture on Natural Science". Newton was elected as a member of the Royal Society of London in 1672. 1689 was elected to the British Parliament. 1696 became the director of Royal Mint. 17o31/kloc-0 was elected president of the royal society on 30th. 1705, the Queen of England and Newton became Sir Isaac.

Newton was the greatest master of science in17th century. His life's contribution to the cause of science covers all fields such as physics, mathematics and astronomy.

Newton's most important achievement in physics is to discover the law of universal gravitation and establish the basic system of classical mechanics. Thus, the first large-scale synthesis in the history of physics was completed.

I am writing a 500-word physics learning experience.

Physics is a newly added course in Grade Two. In the process of studying physics, I think it is very important to cultivate good study habits. In the study of physics, we should first learn to preview and consciously cultivate preview habits. The purpose of preview is to know what to learn; Make it clear which parts of the knowledge you want to learn have been basically understood and which knowledge needs to be explained by the teacher in class. Secondly, we should learn to attend classes with goals and key points, which is inseparable from preview. Only when the purpose of preview is truly achieved can the lecture be targeted and focused. Third, learn to finish your homework independently. Doing homework independently does not simply mean not copying other people's homework, but also means doing homework without referring to textbooks or class notes. Refers to the ability to complete homework independently. Grasp the preview, lecture and homework in the learning process, and summarize what you have learned every week.

Strengthen training and master basic physical skills. In the study of physics, there are two basic skills to master. One is the ability to express problems in physical terms and standardize the writing of physical formulas and problem-solving formats; The writing of physical formulas and the format of solving physical calculation problems should be standardized and skilled. They are the basis of learning physics well. The second is the basic operation ability of physical experiments. Physical experiment operation skills can only be mastered skillfully through a large number of hands-on experiments, and operation skills can only be found on the basis of mastery. You should use your head in the experiment, ask yourself more questions, and then try to solve them. We should learn to observe physical phenomena, analyze and summarize them according to physical phenomena and combined with existing physical knowledge.

Pay attention to basics and understand physical concepts. In the process of learning physics, it is important to pay attention to the understanding of physical concepts, basic concepts and basic laws. When learning every physical concept and physical law, we should not only memorize, but also have imagination and correct thinking ability, so as to truly understand its essence. Therefore, in the process of learning physical knowledge, we must attach importance to the study of physical concepts in each chapter and pay attention to understanding every physical concept and every physical law. In the process of doing the problem, we should pay attention to the foundation, start with the basic problem, lay a good foundation, and then do the difficult problem. In the process of doing the problem, you should think more, have a deep understanding of the problem, learn to be flexible, and lay the foundation for future study.

Levies 500 words for physicists after reading.

Einstein was very playful when he was a child. His mother often worries about this and warns him what to do many times, but he always goes in one ear and out the other. In this way, until the autumn of 16, one morning, my father stopped Einstein who was fishing by the river and told him a story that changed Einstein's life.

The story goes like this: "Yesterday," Einstein's father said, "my neighbor Uncle Jack and I cleaned a big chimney in the southern factory. The chimney can only go up if you step on the steel ladder inside. Your uncle Jack is in the front and I am in the back. We grabbed the handrail and finally climbed up step by step. When I came down, your uncle Jack was still in front and I was still behind him. Later, when I came out of the chimney, I found a strange thing: your uncle Jack's back and face were blackened by soot in the chimney, but I didn't even have any soot on me. "

Einstein's father continued to smile and said, "I saw your uncle Jack and thought I must be dirty like a clown, so I went to the nearby river to wash and wash." And your uncle Jack, seeing me clean when I came out of the chimney, thought he was as clean as me, so he washed his hands and went straight to the street. As a result, everyone in the street laughed and hurt their stomachs. They think your uncle Jack is crazy. "

Einstein couldn't help laughing with his father. When his father finished laughing, he solemnly said to him, "In fact, no one else can be your mirror. Only you are your own mirror. Taking others as a mirror, * * * may make yourself a genius. "

Hearing this, Einstein suddenly looked ashamed. Einstein left the naughty children. He always takes himself as a mirror to examine and reflect on himself, and finally reflects the brilliance of his life.

Feeling: blindly compare with others, think that you are smarter than the people around you, or feel depressed because you are not as good as others. How stupid this is! Everyone has different life goals and lifestyles, and he is the most reliable life guide in the world.

⑽ My favorite physics scientist writes 500 words Baidu document.

My favorite scientist.

When I was very young, I was lying alone under the night sky. The black night sky is decorated with lights and looks very beautiful. Looking at the night sky, when I was a child, I had a dream to see what the sky was like.

When I was in primary school, I studied astronomer Zhang Heng.

Zhang Heng (78- 139) was born in Xi, Nanyang (now stonebridge, Nanyang County, Henan Province). He was a great astronomer in the Eastern Han Dynasty and made an indelible contribution to the development of astronomy in China. In mathematics, geography, painting and literature, Zhang Heng also showed extraordinary talent and extensive knowledge.

Zhang Heng is one of the representatives of Huntian theory in the middle of Eastern Han Dynasty. He pointed out that the moon itself does not shine, and moonlight is actually a reflection of the sun's light; He also correctly explained the cause of the solar eclipse and realized the infinity of the universe and the relationship between the speed of planetary motion and the distance from the earth.

Zhang Heng observed and recorded 2,500 stars, created the world's first leaky ball that can accurately perform astronomical phenomena, the first instrument to test earthquakes-the waiting wind seismograph, and also made a South Locomotive, an automatic drum car, a wooden bird flying to Wan Li and so on.

In order to commemorate Zhang Heng's achievements, people named the crater on the back of the moon as "Zhang Heng Crater" and the asteroid 1802 as "Zhang Heng Asteroid".

Guo Moruo, a famous writer and historian in China in the 20th century, commented on Zhang Heng: "Such an all-round developed figure is also rare in world history and admirable for thousands of years."

Although I don't quite understand why, I am curious about Zhang Heng. I like watching the stars, the night sky and Zhang Heng.

Since I learned that article, I count the stars every night and don't go to bed until late at night every day.

I was naive at the beginning, but now I think it is not so naive.