Was the electric light invented by Edison?

It was invented by Edison, and it was a special sensation at the time, and everyone considered Edison to be a great inventor.

Did you know that the electric light was not invented by Edison, but by someone else? In 1854, the American Goebbels invented a light bulb that emitted light with carbonized bamboo wire under vacuum, but he did not apply for a patent.

In fact, Edison neither invented the electric light bulb nor obtained the first patent for a modern light bulb (incandescent lamp). Before Edison "invented" the electric light bulb in 1979, the light bulb had been around for about 50 years, and at that time, neither in the United States nor in the United Kingdom, Edison had not been granted a patent for this "invention".

The electric light was not Edison's invention, but Goebbels invented the electric light, but he did not maintain this patent in time, so Edison preempted it.

The main reason why Edison invented the electric light was to improve human life. In his time, kerosene lamps or candles were commonly used for lighting, which not only required constant refueling or candle changes, but were also very dangerous. At the same time, the light of kerosene lamps and candles is not bright enough, which makes people have a lot of difficulties in work and life.

Edison wanted to invent a safer, brighter, and more economical way to light. He spent a long time conducting research and experimentation, and eventually succeeded in inventing a light bulb that could emit light continuously. These bulbs use an electric current to heat a filament to make it glow brightly, which is not only safer, but also has a longer life to close, and can last for thousands of hours.

Edison's invention greatly improved human life, allowing people to work and live in a brighter and safer environment, while also promoting the process of modernization. As a result, Edison is regarded as a great inventor and a man who changed the world.

At the beginning of the 19th century, people began to use gas lamps (gas lamps), but the gas was supplied by pipes, and once the gas leaked or blocked, it was very easy to cause accidents, and people were very eager to reform lighting. In fact, Edison set himself the impossible task of creating a system for powering the car in addition to improving the lighting.

So he and his friends worked tirelessly to do more than 1,600 experiments on heat-resistant materials and more than 600 kinds of plant fibers before making the first carbon light bulb, which can burn for 45 hours at a time. Later, he continued to improve the manufacturing method on this basis, and finally launched a bamboo light bulb that can ignite for 1,200 hours.

Extended Materials. Growth stage.

Telegram career. One day in August 1862, Edison saved a boy from the train tracks, and the child's father was the stationmaster of the station, Mackenzie, and was very grateful for it, so he taught Edison the telegraph technique, and under Mackenzie's guidance, Edison learned the telegraph technique and sent his first telegram. Nothing.

In 1863, Edison was introduced by Mackenzie to work as a telecommunications operator at Stratford Junction Station of the Main Trunk Railway, but was fired shortly after.

Between 1864 and 1867, Edison worked as a newspaper operator in the United States, living a vagabond life with no security, during which time Edison changed ten duty stations, five times he was dismissed, and five times he resigned from his job, and he visited Stratford, Adrian, Fort Wayne, Indianapolis, Cincinnati, Nashville, Tennessee, Memphis, Louisville, and Huron.

First of all, the electric light was not invented by Edison, he was just a reform and a very successful improvement on the basis of someone else's invention.

1. The cause of Edison's invention of the electric light:

As early as 1821, British scientists David and Faraday invented an electric lamp called an arc lamp. This kind of electricity uses a charcoal rod as a filament. Although it can emit bright light, the light is dazzling, the power consumption is large, and the life span is not long, which is very impractical.

Therefore, Edison secretly decided: "The arc lamp is not practical, I must invent a soft electric lamp, so that thousands of households can use it." ”

2. The impact of the invention of electric light on society:

Convenient light**, easy to learn, greatly improve people's general awareness level, improve the degree of convenience, and in many candles and oil lamps are not suitable for use of places do not need to burn oxygen, so can illuminate confined spaces. The most important thing is to promote industrial development to some extent.

No.

According to the story of history: on October 21, 1879, Edison in his laboratory, after thousands of experiments, finally succeeded in making the world's first electric light bulb using carbonized winded cotton thread as a filament. In fact, as early as 1801, an English chemist named David completed the electroluminescence of the platinum stone stool, and nine years later, he invented the electric candle, which used the electric arc between two carbon rods to complete the illumination.

Of course, according to the lighting logic of jujube shouting "light bulb", this is not a light bulb in the real sense.

So let's pull the timeline to 1854, when the American scientist Goebbels used a carbonized bamboo wire and put it in a vacuum glass bottle to emit electricity, and the light bulb of Goebbels' experiment at that time could reach 400 hours of continuous light. This was the first real light bulb in history, but Goebbels did not apply for a patent at the time. In 1874, two Canadian electricians invented a technique in which they filled a glass bubble with nitrogen to emit light with an electrified carbon rod, which was equivalent to taking Goebbels's technology one step further.

As expected, these two nuclear diggers would be the first inventors of the light bulb, but unfortunately, at that time, they lacked follow-up funds, that is, there was no money, and scientific research itself was a super expensive thing, so they sold this technology to Edison as we know it in 1875.

The inventor of the electric light was Thomas Alvar Edison.

Edison was not the first to use electricity for lighting, but it was Edison who improved the filament to greatly extend the life of the electric lamp and obtained the patent for the electric light, so Thomas Alva Edison is considered the inventor of the electric light.

The earliest practical electric lamp was the incandescent lamp, but long before the birth of the incandescent lamp, the Englishman Humphrey David used 2000 batteries and two carbon rods to make the arc lamp, but the arc lamp was too bright, produced too much heat and was not durable, and it could not be used in ordinary places.

Nowadays, there are many different types of electric lamps: incandescent lamps, tungsten halogen lamps, fluorescent lamps, gas discharge lamps, high-pressure mercury lamps, LED lamps, etc.

The journey is as follows: Edison began to study electric lighting in his early 20s, and for more than 10 years, he successively chose bamboo cotton, graphite, tantalum ......and so on thousands of different substances as filament materials for testing, often through the sky, once he and his assistants worked for 5 days and nights. In 1879, Edison Bridged used carbon filament as an incandescent filament and lit it for 40 hours.

Because the surface of the carbon filament is porous, brittle, and the strength is very low.

It was soon replaced by tungsten wire. In 1883, Edison discovered the phenomenon of thermal electron emission, also known as the "Edison effect", that is, some electrons or ions near the metal surface are moved irregularly due to high temperatures to obtain enough kinetic energy to attack the ruler, and the binding of the surface of the orange is overwhelmed and escapes from the metal.

The Edison effect is essential for the operation of any vacuum tube, and the cathode, which is the emitting surface, is often coated with a layer of alkaline earth metal oxide to facilitate the emission of electrons, and heated with an electric current to maintain high temperatures. In 1900, Edison invented the iron-nickel battery, which is an alkaline battery with an electromotive force of about 1 3 1 4 volts, which has a long life but is not very efficient.