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Anonymous users2024-02-11The story of Edison's invention of the electric light.
In 1877, Edison began the experiment of reforming the arc lamp, proposing to divide the current and change the arc lamp to a white lamp. The test needs to be satisfactory. It is necessary to find a substance that can burn to a white heat to make a filament, and this filament must withstand the burning of a heat of more than 2,000 degrees Celsius for 1,000 hours.
At the same time, the usage should be simple, able to withstand the impact of daily use, ** to be cheap, but also to make the light and off of a lamp do not affect the light and off of any other lamp, and maintain the relative independence of each lamp in order to choose this kind of lamp. This was a very bold idea at the time, and it required a great deal of effort to explore and experiment. Edison first used carbonized substances for experiments, and then used metal platinum and iridium high-melting point alloys for filament tests, and also did a total of 1,600 different tests on superprime ores and ore seedlings, but the results failed.
But by this time he and his assistants had made great progress, and they had learned that the inblazing filament had to be sealed in a highly vacuum glass sphere and not easily dissolved. In this way, his experiment returned to the charcoal filament. He worked around the clock until the first half of 1880, when Edison's experiments with intoxicating lamps were still inconclusive.
One day, he tore a bamboo filament tied to the side of a banana fan in the laboratory and devoted himself to carbonization, with more than 6,000 kinds of carbonization tests on plants alone. He had more than 200 notebooks totaling more than 40,000 pages, which took three years. He works every day.
Ten. Eight or nine hours. Early in the morning.
At three or four o'clock, he rested on his head two or three books and slept under the experimental table. Sometimes he slept on a stool all day.
Three or four times, only half an hour each time.
By the first half of 1880, Edison's inadvertent experiments were still inconclusive, and even his assistants were discouraged. One day, he tore a bamboo filament tied to the side of a banana fan in the laboratory and made a filament after carbonization, and this time it was better than all the previous experiments, which was Edison's earliest invention of the white-hot electric lamp - bamboo wire electric lamp. This kind of bamboo wire electric light continued for many years.
It was not until 1908 that tungsten was invented as a filament to replace it. The alkaline battery that Edison began to develop after this was very difficult, and his spirit of study was even more amazing. This type of battery is used to supply the prime mover.
He and a select assistant studied painstakingly for nearly ten years, experienced many hardships and failures, and at one moment he thought he had reached his destination, but the next he knew that he was wrong. But Edison never wavered and started all over again. After about 50,000 tests, more than 150 test notes were written before the goal was achieved.
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Anonymous users2024-02-10Think about it yourself!
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Anonymous users2024-02-09<> I just want to say - although he used to be at my front table, I didn't have feet, but after the puzzle is still pretty good, although compared to my male god, not so manly, but also a good little mushroom cool.
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Anonymous users2024-02-08Do you always take the score to ask us to identify whether this is a man or a woman?
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Anonymous users2024-02-07It is often said that humility makes people progress, and pride makes people backward. Every time I heard this phrase before, I wouldn't believe it, until one day in the third grade, I didn't agree with it.
I remember that day, the whole class was immersed in the test papers, and I was no exception. My heart was bouncing like I was holding a rabbit. After the exam, I felt a lot more comfortable like other students.
Soon, the test results came out, I scored 100 points, I was so happy, all my classmates cast envious eyes, I began to be proud, often used my grades to show off my classmates, and soon my classmates began to hate me. But I'm still complacent. When the second exam came, I went to the exam with arrogance, arrogance, and pride.
After the exam, I became arrogant again, thinking that I would definitely be able to take the first exam. Then the results came down, and I took the test paper and looked at it: more than 90 points.
When I look closer, I see that everything that shouldn't be wrong is wrong. I was frustrated, and I looked at the first classmate, who was not like me, showing off everywhere. I began to feel ashamed.
After that, I worked hard to revise, and the third exam came again, I did the questions seriously, and the results came down, and I was the first again; —** of copying.
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Anonymous users2024-02-06You're really out of the coquettish kdj love.
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Anonymous users2024-02-05+ +I have 10 grass rings alone.
Edison invented more than 2,000 in his lifetime, including movies, electric lights, phonographs, generators, electric motors, ** machines, voting counters, etc.
Edison was a world-famous inventor, he was an American, when he was a child, because his family was poor, he only went to school for three months, and he started selling newspapers at the age of eleven or twelve, and he loved science, and he often saved money, and bought scientific books and chemicals, and the equipment he used for experiments, was some bottles and cans from the garbage heap, and when Edison was 12 years old, he sold newspapers on the train, and there was a special car for passengers to smoke, and the captain agreed that he would occupy a corner there, and he moved the chemicals and the bottles and cans there, and sold out of newspapers. So I did all kinds of interesting experiments Once, when the train was moving, it shook a bottle of white phosphorus down, and the phosphorus burned as soon as it came into the air, and a lot of people came and put out the fire with Edison, and the captain was so angry that he threw out all the things that Edison was experimenting with, and slapped him hard, and deafed one of his ears, and Edison's determination to delve into science didn't waver, and he saved money and started doing chemistry experiments again, and once, sulfuric acid burned his clothes; Another time, nitric acid almost blinded him, and he was not intimidated by the danger, but he still did the experiment tenaciously Edison tried to make electric lights, and in order to find a cheap, long-lasting filament, he did many experiments He used to work in the laboratory for dozens of hours in a row, and he was so tired that he lay down on the bench and slept for a while, and he worked so tirelessly that he finally found the right filament, and invented the electric light, and later, Edison invented the motion picture and the gramophone. There were more than 1,000 things he invented in his lifetime, and Edison devoted his whole life to great causes that benefit all mankind; And when it comes to clothing, I don't think too much about it
Reason: Due to the immaturity of the pre-basic technology of electric lamps at that time, the performance of the batteries used for power supply was poor and the voltage was low, and the vacuum technology was not developed. Not only did Swan's electric lamps have little practical value, but they also performed quite poorly, and the poor vacuum technology always caused the carbon filaments to burn out quickly. >>>More
Edison was a great inventor who invented many world-changing inventions and innovations. However, his path to success was not easy, and he often encountered failures and setbacks. In 1884, Edison's laboratory was destroyed by a fire. >>>More
Edison loved science when he was a child, and he loved to get to the bottom of everything, and he had to try it out. Once, when he saw a hen hatching eggs, he asked his mother curiously, "Why is the hen lying on the eggs still?" >>>More