Ratio of amplitude of two coherent sources is 5:2. Ratio of intensity of fringes of constructive and destructive interference for stationary interference of these wave is.....

Options

A. `(49)/(9)`
B. `(25)/(4)`
C. `(3)/(7)`
D. `(5)/(2)`

Answer

A

Explanation

`(E_(1))/(E_(2))=(5)/(2)`
`:. ((E_(1)+E_(2))^(2))/((E_(1)-E_(2))^(2))=((7)^(2))/((3)^(2))=(49)/(9)`
`:. (I_(max))/(I_(min))=(49)/(9)`