An electric light bulb (or bulb), as its exact technical name is an incandescent lamp, is a lamp that USES resistance to heat a thin filament (usually tungsten in modern times) to incandesce by passing electricity through it. The outer edge of the bulb is made of glass, holding the filament in a vacuum, or under a low pressure inert gas, to prevent it from oxidizing at high temperatures. The light bulb is generally thought to have been invented by Thomas Edison, an American. But seriously, another American, Heinrich Gö Bel) developed the same principles and materials decades before Edison. In 1801, David, an English chemist, electrified the platinum wire and made it glow. He also invented the electric candle in 1810. In 1854, Henry goebbels used a charcoal bamboo wire to glow under a vacuum glass bottle. His invention appears to be the first incandescent lamp of practical use today. The bulbs he tested could last up to 400 hours, but he didn't immediately apply for a design patent.
The biggest problem with electric bulbs is the sublimation of the filament. Because tungsten the resistance of the tiny differences caused by temperature is differ, in a larger place, resistance high temperature rises, the tungsten filament also sublimate faster, so cause tungsten and resistance to further increase the circulation; Finally, the tungsten wire is burnt out. It was later found that replacing vacuum with inert gas could slow down the sublimation of tungsten wire. Most bulbs today are filled with nitrogen, argon or krypton gas. Modern incandescent bulbs typically last about 1,000 hours.
Previous: How a light bulb works
Next: No Information