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5 years, 3 months ago
5 years, 3 months ago
An incandescent light bulb produces light with a tungsten-wire filament 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 either evacuated or filled with inert gas. There are two types of constructions of incandescent light bulbs, one entailing a low vacuum and one that is filled with the inert gas. The gas used is either Nitrogen or Argon.
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