Question

how does the bulb glow​

Answer 1

Answer:

When electricity pass through the bulb and generat heat therefore the bulb glow.

Answer 2

Answer:

The bulb glows because when electricity passes through the filament which is made by a metal called tungsten, becomes hot and glows. The gas which is present in the  bulb is either nitrogen, or neon gas which are inert of catching fire.  

Explanation:

No explanation bro. I explained in the answer only.

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