Question

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

• A. the explosion produces high frequency sound waves which are inaudible.
• B. sound waves require a material medium for propagation.
• C. sound waves are absorbed in the atmosphere of moon.
• D. sound waves are absorbed in the earth's atmosphere.

Answer 1

Answer: (B)

As sound waves are mechanical waves they require a medium for propagation. There is no atmosphere on moon.