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The traditional bulb contains a thin wire(AKA filament) that gives off light(and heat) when it's heated white hot by a current passing through it. If you were to do this in ordinary atmosphere the filament would simply burn off. But if you put the filament either in vacuum or in a non-reactive atmosphere it can glow w/o burning.

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Maude Kulas

Lvl 13
2y ago

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