The figure shows a Young's double slit experimental setup. It is observed that when a thin trans....

The figure shows a Young's double slit experimental setup. It is observed that when a thin transparent sheet of thickness and refractive index is put in front of one of the slits, the central maximum gets shifted by a

distance equal to fringe widths. If the wavelength of light used is will be
(2019 Main, 9 April I)
(a)
(b)
(c)