1.

A big explosion on the moon cannot be heard on the earth because     [CPMT 1972; AFMC 2005]

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
Answer» C.   Sound waves are absorbed in the moon's atmosphere


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