The story of electric light is about 300 words.

Composition: 300 words for telephone and electric light

The invention of electric light

Before the advent of electric light, candles,

The story of electric light is about 300 words.

Composition: 300 words for telephone and electric light

The invention of electric light

Before the advent of electric light, candles, kerosene lamps or gas lamps were widely used as lighting tools. 1878 In September, Edison decided to invent the electric light. He read a lot of books about electric lights and was determined to invent a cheap, durable, safe and convenient lamp. Edison carefully summed up the previous experience of lighting failure and made a detailed test plan. 1879 After several experiments, Edison finally decided to make a carbon filament. The most famous electric light is an invention of19th century, and it is also Edison's most brilliant contribution to mankind.

How did Edison invent the electric light 300 words?

Edison invented the light bulb.

On a snowy afternoon, Edison's mother suddenly fell ill. In the evening, my father invited a doctor. It turns out that my mother's illness is acute appendicitis, and she needs an operation immediately.

At that time, there was no electric light, and the light of the oil lamp was dim. It is dangerous to operate with oil lamp lighting, so the doctor hesitated. My mother groaned in pain, my father rubbed his hands helplessly, and Edison stood by and looked at my mother anxiously. As time went on, Edison's palms were sweating. Suddenly, his eyes lit up and he said, "Doctor, I have an idea." With that, Edison took out all the oil lamps. The doctor looked at it, shook his head and said, "These lights are around to block hands!" " "Who knows, Edison moved a big mirror, put the oil lamp on the box, and put the mirror behind the oil lamp, which not only didn't stop, but also made the lamp light up a lot.

After the doctor successfully finished the operation, he said happily, "Son, you saved your mother with your wisdom."

Mom woke up, and Edison took her hand and said solemnly, "Mom, it's inconvenient to have no sun at night. I want to create a' sun' at night. "

Later, Edison finally invented the electric light through unremitting efforts.

The story of Edison inventing the electric light, 300 words.

The story of Edison's invention of electric light:

/kloc-At the beginning of the 0/9th century, people used oil lamps and candles for lighting, but if they were not careful, there would be a fire. Edison was determined to make electric lights to bring light to mankind in order to liberate mankind from the bondage of night.

Edison invented the electric lamp and did 1500 experiments, but failed to find a suitable material for the lamp filament. Through the experiment of 1600 heat-resistant material and more than 600 kinds of plant fibers, the first carbon filament bulb was made, which can burn for 45 hours at a time.

Later, on this basis, he constantly improved the manufacturing method, and finally invented a bamboo light bulb that can ignite 1200 hours, which has been used for 30 years.

(3) The story of electric light is expanded to read about 300 words:

1879101October 2 1 day, American scientist Edison invented the electric lamp, namely the incandescent lamp, which is a kind of lamp that heats filaments into incandescent light by means of electricity and resistance. Edison was the first inventor in the world to use the principle of mass production and his industrial research laboratory to produce inventions. Edison has more than 1500 patents under his name. General Electric Company was founded in 1892.

Electric light bulb or electric ball, the exact scientific name is incandescent lamp, which is a kind of lamp that heats young filament (usually tungsten filament in modern times) to incandescent by electrifying and using resistance to emit light. The periphery of the bulb is made of glass, which keeps the filament in vacuum or low-pressure inert gas to prevent the filament from oxidation at high temperature.

It is generally believed that the electric light was invented by Thomas Edison, an American. But if the textual research is serious, another American, Henri Goebbels (Heinrich G? Bel) A reliable electric light bulb was invented with the same principles and materials decades before Edison, and many people made many contributions to the invention of electric light before Edison.

180 1 year, the British chemist David electrified the platinum wire to glow. He also invented the electric candle in 18 10, which was illuminated by an arc between two carbon rods. 1854, Henry Goebbels put a carbonized bamboo filament under a vacuum glass bottle to make it glow. Today, his invention seems to be the first incandescent lamp with practical value. The light bulb he tested at that time could last for 400 hours, but he didn't apply for a design patent immediately.

The story of Edison's invention of electric light is 300 to 350 words.

The story of Edison's invention of electric light:

Edison and his assistants tried platinum several times, but this kind of platinum with high internal melting point prolonged the light-emitting time of the electric lamp a lot, but it was not ideal to turn it off automatically from time to time and then emit light automatically.

Undaunted, Edison continued his experimental work. He has tried rare metals such as barium, titanium and indium, and the results are not very satisfactory.

Next, he and his assistants began to test 1600 kinds of heat-resistant materials, and platinum was the most suitable one. Due to the improved air extraction method, the glass bubble is vacuum. The life of the lamp has been extended to two hours. But this kind of platinum lamp is too expensive. Who wants to spend so much money on a light that can only last for two hours?

Edison saw this scarf made of cotton yarn, and an idea suddenly appeared in Edison's mind:

Yes! Cotton yarn has better fibers than wood. Can you use this material?

He quickly tore off a cotton yarn from his scarf and carefully put this carbon filament into the glass bubble, which really worked well.

Edison was very happy. He made many carbon filaments made of cotton yarn and did many experiments. The life of the light bulb was extended by 13 hours, and then it reached 45 hours.

"I hope it will open for 1000 hours, which is 16000 hours!" Edison said.

Finally, Edison finally chose bamboo. He first took out a bamboo and put it in a glass bulb. After electrifying, the bamboo filament bulb lit continuously 1200 hours!

He finally made the electric light he was satisfied with.

Write a story about Edison inventing the electric light in about 300 words.

Enter the network.

Use the example of Edison's invention of electric light to prove that "success requires persistence", 300 words.

The story of Edison inventing the electric light.

Before the invention of electric light, when it was dark, people could only rely on moonlight, torches, candles and oil lamps lit by walnut oil.

Today, our night is brightly lit, which is the credit of a great American inventor Edison.

/kloc-more than 0/00 years ago, people began to use the earliest electric lamp-arc lamp. But 30-year-old Edison saw that the arc lamp was weak and easy to hurt his eyes, so he kept changing the carbon rods for burning. Ignoring other people's jokes that he was a fool, he boldly put forward to turn the arc lamp into white light, in order to make the electric lamp light up for a longer time.

It is not easy to find a suitable filament material. Edison did countless different experiments, but all failed. But he still insists on working in the laboratory until the early hours of the morning every day. When you are tired, put two or three books on your head and sleep under the experimental table for a while.

Finally, one day three years later, Edison tore a bamboo filament at the edge of the banana fan into a filament. As a result, he invented a white-hot electric lamp-bamboo filament electric lamp.

A few years later, he used tungsten wire instead of bamboo wire, and finally invented the incandescent lamp that people still use today-tungsten lamp.

The scientist's short story is about 300 words.

Watt steam engine

One summer morning, the weather was fine, and the thrush was singing a sweet song in the tree. On the campus of Glasgow University in England, there is a man walking. He walked slowly up and down on the green lawn. He sometimes looked at the vast sky, sometimes at the winding playground, and sometimes frowned ... Suddenly, a smile appeared on his face and his mood suddenly became clear. He came up with an effective solution to the steam engine. He ran happily, his feet flying fast. In an instant, he appeared on the operating platform that accompanied him for many years. He is Watt, the inventor of the steam engine. Someone once said, "Watt invented the steam engine because he has superhuman genius and wisdom." Actually, it is not. To illustrate this problem, let's talk about Watt's diligent study and study. Make up a story

Enlightenment of water vapor

With the development of intellectual education, Watt became interested in some objective things, and he became curious and delved into them. This laid a good foundation for his later invention of the steam engine.

In Watt's hometown of Greenock, every family makes a fire to boil water and cook. Who cares about such a common thing? Watt left his heart. Is there a Huai? He watched his grandmother cooking in the kitchen. There is a pot of boiling water on the stove. The boiling water is boiling. The lid of the pot smacked and kept jumping up. Watt observed it for a long time and felt very strange. He wanted to know what the reason was, so he asked his grandmother. What makes the lid jump? "

Grandma replied, "The water is boiling, that's all."

Watt asked discontentedly, "Why does the water jump as soon as the lid is opened?" ? Is something pushing it? "

Maybe grandma was too busy to answer him correctly, so she said impatiently, "I don't know." What is the significance of children asking these questions? "

Instead of finding the answer with grandma, Watt was unfairly criticized. He was very uncomfortable, but he didn't lose heart.

For several days in a row, whenever cooking, he squatted by the fire and observed carefully. At first, the lid was very stable. After a while, the water will boil and make a loud noise. On the ground, the steam in the pot came out and pushed the lid to jump. The steam kept rising, and the lid kept beating, as if a magician was hiding inside, doing tricks. Watt almost cried out for joy. He opened the lid, closed it again and again, and verified it again and again. He also covered the cup and spoon that sprayed steam. Watt finally figured out that steam pushed the lid to jump, and the power of this steam was not small.

Just as Watt was in high spirits and ecstatic, grandma spoke again: "You child, you don't know good or bad. What's so funny about the kettle?" Go away! " She said casually.

His grandmother is too impatient and subjective, and if she neglects it casually, it will almost dampen Watt's self-esteem and enthusiasm for exploring scientific knowledge. Old man, you don't understand Watt's heart at all, do you? What a revelation water vapor is to Watt! Isn't the physical phenomenon that water vapor pushes the lid of the kettle to jump off the water bottle the source of Watt's understanding of inventing the steam engine?

1769, watt changed the steam engine into a single-acting engine with great power. Later, after many studies, the trial production of the new steam engine was completed in 1782. With the linkage device on the machine, the simple motion turned into rotary motion, and the perfect steam engine was successfully invented.

Due to the invention of the steam engine and the developed coal and iron industry in Britain at that time, Britain became the first country in the world to use steam to drive iron "seagoing ships". /kloc-in the 0/9th century, the reform of maritime transportation began, and some countries entered the so-called "steamboat era". Since then, ships have been sailing on the boundless ocean. Subsequently, coal mines, factories and trains all used steam engines. Manual labor was liberated and the economy developed. This is the result of the invention of the steam engine. Of course, this is also the credit of Watt, the inventor of the steam engine. Therefore, Watt is famous all over the world.

Watt's life is full of hardships and struggles. What a bumpy road he has traveled. He created blessings for mankind in hardships and hardships and opened up a new milestone for human progress. Watt attaches great importance to study and practice. Learning enriched his wisdom; Practice has achieved fruitful results.

It is said that on the first day Einstein came to Princeton Institute for Advanced Studies, the administrator asked him what equipment he needed, and he replied, "I think a table or counter, a chair, some paper and pens will do." Oh, yes, and a big wastebasket. " The manager asked strangely, "Why do you want a big one?" Einstein replied, "so I can throw all my mistakes in." The world has always been like this Every ordinary or great person makes mistakes. Only people like Einstein can see an upward path by constantly abandoning their mistakes.

Scientists' short story is 300 words.

The invention of electric light

The lamp is a great invention for human beings to conquer the night. 19th century ago, people used oil lamps and candles for lighting, which broke through the night, but still failed to completely liberate mankind from the restriction of the night. Only with the birth of the generator can we light up the world with all kinds of electric lights, turn night into day, expand the scope of human activities, win more time and create wealth for society.

It was the American inventor Edison who really invented the electric light to make it shine. He is the child of a railway worker. He dropped out of school before finishing primary school and made a living by selling newspapers on the train. Edison is an extremely diligent man. He likes to do all kinds of experiments and make many exquisite machines. He is particularly interested in electrical appliances. Ever since Faraday invented the electric motor, Edison was determined to make electric lights and bring light to mankind.

Edison made a detailed test plan after carefully summarizing the previous failure experience in manufacturing electric lamps, and conducted experiments in two aspects: one was to classify and test more than 600 different heat-resistant materials of/kloc-0; The second is to improve the vacuum pumping equipment to make the bulb have a high vacuum degree. He also studied the new generator and circuit shunt system.

Edison tested 1600 kinds of heat-resistant luminescent materials one by one, but the linear energy of platinum wire is good, but the price of platinum is amazing, so we must find a more suitable material to replace it. 1879, Edison finally decided to use carbon filament after many experiments. He sprinkled carbon powder on a piece of cotton silk, bent it into a horseshoe shape, heated it in a crucible, made it into a filament, put it in a bulb, and then pumped the air out of the bulb with an air extractor. It can be used continuously for 45 hours when the light is on. In this way, the first batch of carbon filament incandescent lamps in the world came out. 1879 On New Year's Eve, Lopark Street where Edison Electric Company is located is brightly lit.

In order to develop electric light, Edison often worked in the laboratory for more than ten hours a day, and sometimes experimented for several days. After he invented carbon fiber, he experimented with more than 6000 kinds of plant fibers. Finally, he chose bamboo filaments, burned them in a high-temperature closed furnace, and then processed them to obtain carbonized bamboo filaments, which were put into the light bulb, thus improving the vacuum degree of the light bulb again, and the light bulb could be continuously lit for 1200 hours. The invention of electric light once caused natural gas stocks to plummet 12% in three days.

After Edison, 1909, American Ke Renqi invented tungsten wire instead of carbon wire, which greatly improved the efficiency of electric lamp. Since then, electric lights have leapt to a new level, and fluorescent lamps, iodine tungsten lamp and other lights have mushroomed on the lighting stage.

Lights turn darkness into light and make the world more dazzling and colorful.

Black fairy tales consist of candles, electric lights and flashlights in 300 words.

In my school career, countless teachers have taught me the truth of being a man. In that faint past, there are faint memories. That faint memory has become an eternal constellation in my mind. Teachers are as pure and shining as stars. Their feelings are deeply imprinted on the river in my memory. In my memory galaxy, there are so many stars that I feel extremely proud, proud! I am glad to have these star-like teachers, who have given me a source of knowledge!

No matter how long the memory is, whenever I think of my teacher, my passion is still hard to restrain; Whenever I face a familiar teacher, those little things always arouse my long-term gratitude to the teacher; The love between our teachers and students set our hearts free in the universe, fixed it as eternity, and cast a monument of' people'. Teachers, like red candles, will spare no effort to flow their ointment to the world, cultivate gratifying flowers and form happy fruits. In memory, the teacher's eyes are like the most beautiful notes, singing the most beautiful songs; In my mind, the teacher's eyes are a wooden bridge, swaying our naughty, in order not to let us jump into the quagmire of life; The teacher's eyes are a path, winding and measuring our childishness, in order not to let us be trapped in thousands of difficulties and dangers. The teacher's eyes are a bunch of lightning, which obviously goes out, but reflects our confusion, in order not to let us cry in the fog of life. In my eyes, the teacher's eyes are gentle wind, gently greeting the seedlings; The teacher's eyes are long lines, and what is long is its concern for students; The teacher's eyes are the deep sea, and what is deep is his love for the world. And the teacher is a flower on the road of our life, which blooms for us, then fades and turns yellow again. When we study hard, the teacher is a lamp. It opens for us and then goes out. Teacher! You are our street lamp, illuminating our journey of life. Teacher! You are our flower protector, and you have cultivated thousands of colorful flowers. At this point, we want to say; Teachers can also contribute if they work hard. You will always be an eternal candle in our hearts, because only with you will we have light!

Edison's success story is 300 words.

At the age of eight, Edison successfully saved his mother with his wisdom.

At that time, Edison lived in a small mountain village in America. One night, Edison's mother suddenly had a stomachache and rolled in bed with pain. Edison's father hurried to call a doctor by bike. After a while, the doctor came and diagnosed that Edison's mother had acute appendicitis and needed an operation at once. But there is no kerosene lamp at home, and the doctor says the light is too dim to operate. Edison's father jumped about in anxiety, and Edison's mother was sweating with pain. Little Edison turned his head and remembered playing with friends this morning. His glasses would reflect the sun. Thinking of this, Edison ran out like a gust of wind and borrowed four big mirrors and kerosene lamps from his neighbor's house. Put the kerosene lamp in front of the big mirror and the room suddenly lit up. The operation was successful and my mother was saved. Dad boasted that Edison was a clever boy.

This story tells us that to be a conscientious person in life, we must learn this wit from Edison!