If ratio pf maximum to minimum intensities of the fringes, produced in a Young' s double slit experiment is 4:1 , what is the ration of the amplitudes of light waves of coherent sources?

Explanation

In this case `I_("max")/I_("min")=(A_(1)+A_(2))^(2)/((A_(1)-A_(2))^(2))`
or , `(4)/(1)=(A_(1)+A_(2))^(2)/((A_(1)-A_(2))^(2))or,((A_(1)+A_(2)))/((A_(1)-A_(2)))=(2)/(1)`
`(A_(1)+A_(2)+A_(1)-A_(2))/(A_(1)+A_(2)-A_(1)+A_(2))=(2+1)/(2-1)" ""or"A_(1)/A_(2)=(3)/(1)`