1.

A point source emits sound equally in all directions in a non-absorbing medium, Two points P and Q are at distance of 2m and 3m respectively from the source. The ratio of the intensities of the waves at P and Q is [CBSE PMT 2005]

A.            9 : 4         
B.            2 : 3
C.            3 : 2         
D.            4 : 9
Answer» B.            2 : 3


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