In the Young's double slit experiment, the interference pattern is found to have as intensity ratio between the bright and dark fringes as 9. This implies that

Answer

B, D

Explanation

`=((sqrt(I_(1))+sqrt(I_(2)))^(2))/((sqrt(I_(2))+sqrt(I_(2)))^(2))=(9)/(1)`
By checking the options `I_(1)=4` unit. `I_(2)=1` units.
and `(A_(1))/(A_(2))=sqrt((I_(1))/(I_(2)))=2`