In the YDSE shown below, two slits are covered with thin sheets having a thickness t and 2t and refractive indices `2mu` and `mu` respectively. The position of central maxima is shifted by a distance of N (in cm) from the central position of the screen. Find the value of N.
`[d=1 mm, D = 1 m, t = 2xx10^(-2)mm,mu=(3)/(2)]`

Answer

2