![]() Since inert gases normally don't react with other elements, there is no chance of the elements combining in a combustion reaction.Ĭheap, effective and easy-to-use, the light bulb has proved a monstrous success. When a tungsten atom evaporates, chances are it will collide with an argon atom and bounce right back toward the filament, where it will rejoin the solid structure. In a modern light bulb, inert gases, typically argon, greatly reduce this loss of tungsten. This reduces the life of the bulb considerably. ![]() As more and more atoms evaporate, the filament starts to disintegrate, and the glass starts to get darker. ![]() In a vacuum bulb, free tungsten atoms shoot out in a straight line and collect on the inside of the glass. At such extreme temperatures, the occasional tungsten atom vibrates enough to detach from the atoms around it and flies into the air. The problem with this approach was the evaporation of the tungsten atoms. Since there wasn't any gaseous matter present (or hardly any), the material could not combust. In the first light bulbs, all the air was sucked out of the bulb to create a near vacuum - an area with no matter in it. ![]() The filament in a light bulb is housed in a sealed, oxygen-free chamber to prevent combustion. ![]()
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