a wave travels uniformly in all directions frm a pt source in an isotropic medium .the displacement of the medium at any pt at a distance r frm d source may be represented as(a isa constant representing strength of source )
(1)a/√rsin(kr-wt)
(2)a/rsin(kr-wt)
(3)arsin(kr-wt)
(4)a/r2sin/(kr-wt)
ans (2)
plz post soln also
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2 Answers
62Intensity is directly proportional to square of Amplitude
also the total energy must be constant
so 4piR2 x A2 = C
so A(r)r=Constant
so A(r)=Constant/r
here constant is a!
