First slide

Introduction to waves

Question

A big explosion on the moon cannot be heard on the earth because

Easy

A

The explosion produces high frequency sound waves which are inaudible
B

Sound waves required a material medium for propagation
C

Sound waves are absorbed in the moon's atmosphere
D

Sound waves are absorbed in the earth's atmosphere

Solution

For a large distance between earth and moon there is no atmosphere. Here sound cannot travel to reach earth.

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