Human history who invented the first light bulb

Now people for the light is already used to it, we can't imagine the world without lights, how will be dark and difficult to that night. So, who invented the electric light?

the first electric lamp is not Edison human invention actually light is first appeared in the early 19th century. In the early 19th century, a British chemical household 2000 cells and two carbon, made the world's first light arc lamp. But this kind of light is too strong, can only be installed on the streets or squares, ordinary families can't use. Numerous scientists to rack one's brains, want to make a kind of cheap and fine, durable household electric light.

until October 21, 1879, the famous American scientist Thomas Alva Edison invented the world's first light plough mouth light bulb, the size of human beings enter the era of electric lighting.

carbon filament incandescent invented by Thomas Edison in the process of development, Thomas Alva Edison was carefully analyzed the gas and arc light, his main direction is looking for a kind of heat resistant material. By current to burn it to the intense and fiery light but not broken or melted. He stumbled on cotton suddenly ashes in the air, and carbon cotton into the processed glass ball far issued on the light. Unfortunately, the light lasted only a few minutes disappeared. He gave up the experiment, wrongly, that in turn to try cesium, nickel, platinum, Platinum) , platinum-iridium alloy 1600 different refractory material, such as harvest is little.

later Edison back to the research on carbon. 5 hours, he continuously improve the carbonation method and extraction process. Fully lit 45 hours, after more than a year of efforts, thousands of tests. People look forward to already a long time the lights finally was born.

in the second year, he can produce continuous bright 1200 hours on the bamboo filament lamp.

it was not until 1904 that the austrians invented three times stronger than the bamboo filament lamp of tungsten, the former to be replaced. Tungsten since 1907 has been in use today.

the author main lobe China lighting network Feng Yaoyuan

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