"Genius is one percent inspiration, ninety-nine percent perspiration."
Thomas Alva Edison (February 11, 1847 – October 18, 1931) was an American inventor and businessman. He developed many devices that greatly influenced life around the world, including the phonograph, the motion picture camera, and a long-lasting, practical electric light bulb.
Edison did not invent the first electric light bulb, but instead invented the first commercially practical incandescent light. Many earlier inventors had previously devised incandescent lamps. Some of these early bulbs had such flaws as an extremely short life, high expense to produce, and high electric current drawn, making them difficult to apply on a large scale commercially.
An incandescent light bulb is an electric light which produces light with a filament wire heated to a high temperature by an electric current passing through it, until it glows. The hot filament is protected from oxidation with a glass bulb that is filled with inert gas. The light bulb is supplied with electrical current by feed-through terminals or wires embedded in the glass. Most bulbs are used in a socket which provides mechanical support and electrical connections. | 1. Outline of Glass bulb 2. Low pressure inert gas (argon, nitrogen, krypton, xenon) 3. Tungsten filament 4. Contact wire (goes out of stem) 5. Contact wire (goes into stem) 6. Support wires (one end embedded in stem; conduct no current) 7. Stem (glass mount) 8. Contact wire (goes out of stem) 9. Cap (sleeve) 10. Insulation (vitrite) 11. Electrical contact |
The light bulb changed the world because it allowed for the use of light by electricity. Before that the only light provided was either natural daylight or by candle light. It revolutionized how people lit their homes.
The light bulb is important in many peoples lives! Without this wonderful invention we would still be spending our days and nights in darkness!
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