Vacuum is created in an electric bulb so that ........

General Science (Easy) Physics

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Vacuum is created in an electric bulb so that

It gives clear, bright light

It does not get heated up

The filament is not burnt up in the presence of air oxygen

It gives abundant light

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Explanation:

The filament is not burnt up in the presence of air oxygen

-The general principle was, and still is, this: When electrical current flows through the bulb's filament, the filament heats up and glows, which produces light. The inside of the bulb is a vacuum, hence oxygen-free, so the filament doesn't get oxidized and the glow lasts a long time.