Refractive index of the glass slab =
A) \(\frac{Thickness \,of \,the \,glass \,slab}{Vertical \,shift}\)
B) \(\frac{Thickness \,of \,the \,glass \,slab}{Lateral \,shift}\)
C) \(\frac{Thickness \,of \,the \,glass \,slab}{Thickness \,of\, the \,glass \,slab\, – \,verticalshift}\)
D) \(\frac{Thickness \,of \,the \,glass \,slab}{Thickness \,of\, the \,glass \,slab \,– \,lateralshift}\)