A fictional story by scientists.

King Hennon asked the goldsmith to make a pure gold crown for him. After it was done, the king suspected that the craftsman had mixed silver into the crown, but the crown was as heavy as the pure gold given to the goldsmith at the beginning. Did the craftsman play tricks? The problem of trying to test the authenticity without destroying the crown not only stumped the king, but also made the ministers look at each other. Later, the king gave it to Archimedes. Archimedes thought hard about many methods, but all failed. One day, he went to the bathhouse to take a bath. Sitting in the bathtub, he saw the water overflowing and felt his body being gently pulled up. He suddenly realized that he jumped out of the bathtub and went straight to the palace without clothes on. He shouted "Eureka" and "Frica" all the way. It turns out that if the crown is put into water, the amount of water discharged is not equal to the same weight of gold, and it must be mixed with other metals. This is the famous law of buoyancy, that is, an object immersed in a liquid is subjected to upward buoyancy, and its size is equal to the weight of the liquid discharged by the object. Later, this law was named Archimedes principle.

Newton! I like him very much. He is both great and strong.

Newton isaac newton (1642- 1727)

British physicist. Based on the work of Galileo and others, he conducted in-depth research and established Newton's law of motion, which became the basis of classical mechanics. He further developed the work of Kepler and others and discovered the law of universal gravitation. Because he established the basic system of classical mechanics, people often call classical mechanics "Newtonian mechanics". In optics, he used the prism in 1666 to analyze sunlight, and found that white light is composed of different colors (that is, different wavelengths). In terms of heat, he defined the law of cooling. In astronomy, he founded the reflecting telescope in 167 1. Mathematically, Newton's binomial theorem was established and differential calculus was established with Leibniz. His main works include natural philosophy and mathematical principles of optics.

When Newton was a child, he only liked mathematics, and his grades in other subjects were not good. The teacher thought Newton was an imbecile. Later, because Newton was very diligent, his academic performance continued to improve and he became the top student in his class. 19 years old, Newton was admitted to the famous Cambridge University in Britain. Newton became a professor at the age of 27.

Newton seldom rested before two or three in the middle of the night and often worked all night.

Newton is one of the giants in science. Engels once commented on Newton's scientific achievements in the18th century in the article The Situation in Britain:

"Newton founded scientific astronomy because he invented the law of universal gravitation, scientific optics because he decomposed light, scientific mathematics because he founded binomial theorem and infinite theory, and scientific mechanics because he knew the essence of force."

However, Newton was very modest. He has two simple and touching words, which have become famous sayings in the scientific community:

"I don't know what the world thinks of me, but I just feel like a child playing on the beach. Sometimes I pick up a smooth and beautiful stone happily, but I still haven't found the sea of truth."

"If I see farther than Descartes, it is because I stand on the shoulders of giants."

Descartes: French philosopher, physicist and mathematician. The founder of analytic geometry. Edison invented the electric light. His first bride in the future. In Newark, he invented wax paper and mimeograph. From 1872 to 1875, Edison invented the two-pole and four-pole telegraph successively, and helped others to make the world's first English typewriter.

1876 In the spring, Edison moved to Monroe Park in New Jersey again. He built the first "invention factory" here, which "marked the beginning of collective research". 1877, Edison improved the telephone invented by Bell and put it into practical use. He also invented the phonograph, one of his favorite projects. Telephone and telegraph "are a revolution to expand human sensory functions"; The phonograph is one of the three great inventions that have changed people's lives. "From the imagination of the invention, this is his extremely significant invention achievement." At this time, people called him "the magician of Monroe Park".

When Edison invented the phonograph, after numerous failures, he finally made a breakthrough in the study of electric lights. 1879, 10 year1October 22nd, Edison lit the first electric lamp with wide practical value. In order to prolong the life of the filament, he tried more than 6,000 kinds of fiber materials and found a new luminous body-Japanese bamboo filament, which can last for more than 1000 hours and achieve the purpose of durability. To some extent, this invention is the pinnacle of Edison's life. Then, he created a power supply system, which made the distant lights distribute electricity from the central power station, which was a great technical achievement.

His first discovery in pure science appeared in 1883. When testing the electric lamp, he observed what he called the Edison effect: in a lighted bulb, charge travels from the hot filament through space to the cold plate. Edison applied for a patent for this discovery in 1884, but did not study it further. Scientists nearby developed the electronic industry, especially radio and television, by using the Edison effect.

Edison tried to do for his eyes what the phonograph did for his ears, and the movie camera was born here. He took photos with a piece of celluloid film newly invented by George Heasman.

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