Optics 7 Question 30

31. A point source emits sound equally in all directions in a non-absorbing medium. Two points P and Q are at a distance 9m and 25m respectively from the source. The ratio of amplitudes of the waves at P and Q is

(1989,2M)

True / False

Show Answer

Solution:

  1. I1r2 (in case of point source)

and IA2

A1r or A1A2=r2r1=259



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