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A bomb explodes on the moon. You will hear its sound on earth after ______
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- 20 minutes
- 2 hours 20 minutes
- 3.7 hours
- You cannot hear the sound of explosion
- 20 minutes
Correct Option: D
The sound will never reach Earth because there are not enough molecules or atoms of matter per cubic centimeter of space to create the pressure waves in a medium that is a sound wave. In simple words, Sound propagation needs a medium. The people on the Earth can see the flash, but no sound.
