If you are walking on the moon surface, can you hear the cracking sound behind you? Explain.
1 Answer
A sound wave is a mechanical wave so it requires a medium for propagation but there is no atmosphere i.e. medium on the moon surface. There is a lack of atmosphere on the moon because of its weak gravity. So, due to lack of medium (i.e. atmosphere), the propagation of sound waves on the moon's surface is not possible. That is why we cannot hear the cracking sound behind us while walking on the surface of the moon.
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