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A line source emits a cylindrical expanding wave. If the medium absorbs no energy then the amplitude will vary with distance `r` from the source as proportional to
A. `r^(-1)`
B. `r^(-2)`
C. `r^(-1//2)`
D. `r^(1//2)`

1 Answer

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Best answer
Correct Answer - C
`I prop 1/r prop A^(2)" "rArr" "A prop r^(-1//2)`

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