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When an electric bulb breaks, there is an explosive sound. That is due to

  • A.The chemical reaction between the gases inside the bulb
  • B.The compressed gases inside rushing out suddenly
  • C.The air outside rushing in to fill the vacuum inside the bulb
  • D.None of these

Answer: C

The sound comes from air rushing in to fill the vacuum inside the bulb.

The bulb is either evacuated or filled with gas at low pressure. When the glass breaks, atmospheric air rushes in at high speed and the sudden compression produces the pop - an implosion rather than an explosion.

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