How a Lightbulb Works
This is a video of how a light bulb works. An electric current passes through a very thin filament of tungsten, a gray-white, heavy, hard metallic element. Current passing through the very thin filament encounters very high resistance and forces the filament to heat to a temperature of 2,500ºC until it is white hot. Light resulting from heating is called incandescent light.
credit: ScienceVIEW staff
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