Shifting OF Fringing Pattern

In YDSE with d = 1 mm and D = 1 m , Slabs of (t = 1 mu m, mu = 3) and (t = 0.5mu m, mu = 2) are introduced in front of upper and lower slits, respectively. Find the shift in the fringe pattern.

The contrast in the fringes in an interference pattern depends on

On placing a thin film of mica of thickness 12xx10^(-5)cm in the path of one of the interfering beams in young's double slit experiment using monochromatic light, the fringe pattern shifts through a distance equal to the width of a bright fringe. If lamda=6xx10^(-5)cm , the refractive index of mica is

In a single slit diffraction pattern, which of the following is incorrect for fringe pattern?

YDSE is conducted using light of wavelength 6000 Å to observe an interference pattern. When a film of some material 3.0xx10^(-3) cm thick was placed over one of the slits, the fringe pattern shifted by a distance equal to 10 fringe widths. What is the refractive index of the material of the film ?

The contrast in the fringes in any interference pattern depends on:

Interference fringes were produced in Young's double slit experiment using light of wavelength 5000 Ã…. When a film of material 2.5xx 10^(-3) cm thick was placed over one of the slits, the fringe pattern shifted by a distance equal to 20 fringe widths. The refractive index of the material of the film is