Light waves form two coherent source having internsity ration `81:1` produce interference. Then, the ratio of maxima and minima in the interference pattern will be

Explanation

Given, `(I_(1))/(I_(2))=(A_(1)^(2))/(A_(2)^(2))=(81)/(1)`
`:. (A_(1))/(A_(2))=(9)/(1)` or `A_(1)=9 A_(2)` …….(1)
`:. (I_(max))/(I_(min))=((A_(1)+A_(2))^(2))/((A_(1)-A_(2))^(2))`
" From Eq. " (i), we get
`(I_(max))/(I_("min"))= ((9A_(2)+A_(2))^(2))/((9A_(2)-A_(2))^(2)) = ((10)^(2))/((8)^(2)) =(25)/(16)`