The light bulb, which emits light and gives off heat through electric energy, was invented by Henry Goebbels (Edison actually found a suitable material, that is, he invented the incandescent lamp with strong practicability, and the light bulb appeared as early as 1854). The most common function of light bulbs is lighting. With the development of society, the use of light bulbs has also undergone different changes. At first, it may be for the convenience of production and life, but with the progress of society, the use of light bulbs has also changed obviously, and functional lights with different uses such as "automobile, beautifying environment and decoration" have begun to appear.
Light bulb (or electric ball), the exact scientific name is incandescent lamp, which is a kind of lamp that heats a thin wire (usually tungsten wire in modern times) to incandescent state by electricity 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. When it comes to incandescent lamps, it is generally believed that electric light was invented by Thomas Edison, an American. But if the research is serious, another American, Henri Goebbels (HeinrichG? Bel) invented the same principle and material decades 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. His invention seems to be the first incandescent lamp with practical value today. The light bulb he tested at that time could last for 400 hours, but he didn't apply for a design patent immediately.
The biggest problem of light bulb is the sublimation of filament. The temperature is different because of the tiny resistance difference on the tungsten wire. Where the resistance is high, the temperature rises higher and the tungsten wire sublimates faster, which leads to the thinning of the tungsten wire and the further increase of the resistance. Finally, the tungsten wire burns out. Later, it was found that replacing vacuum with inert gas could slow down the sublimation of tungsten wire. Today, most light bulbs are filled with nitrogen, argon or krypton. The life of modern incandescent lamps is generally about 1 1,000 hours.