n Young’s double slit experiment, a thin uniform sheet of glass is kept in front of the two slits,

Question

In Young's double slit experiment, a thin uniform sheet of glass is kept in front of the two slits, parallel to the screen having the slits. The resulting interference pattern will satisfy
(A) The interference pattern will remain unchanged
(B) The fringe width will decrease
(C) The fringe width will increase
(D) The fringes will shift.

Answer 1

(A) The interference pattern will remain unchanged