If an interference pattern have maximum and minimum intensities in `36:1` ratio, then what will be the ratio of amplitudes?

Options

A. 5:7
B. 7:4
C. 4:7
D. 7:5

Answer

D

Explanation

`(I_("max"))/(I_("min"))= ((A_(1)+ A_(2))^(2))/((A_(1)- A_(2))^(2)) implies (A_(1)+ A_(2))/((A_(1)- A_(2))) =6 implies (A_(1))/(A_(2))+ 1= 6(A_(1))/(A_(2))- 6 implies (A_(1))/(A_(2))= (7)/(5)`