The displacement vs time graph for two waves A and B which travel along the same string arre shown in the figure. Their intensity ratio `I_(A)|I_(B)` is

Options

A. `9/4`
B. 1
C. `81/16`
D. `3/2`

Answer

B

Explanation

`(I_(1))/(I_(2))=(a_(1)^(2)f_(1)^(2))/(a_(2)^(2)f_(2)^(2))=((3)^(2)(8)^(2))/((2)^(2)(12)^(2))=1`