(a) With the help of a diagram, show how when light falls obliquely on the side of a rectangular glass slab, the emergent ray is parallel to the incident ray. . (b) Show the lateral displacement of the ray on the diagram. (c) State two factors on which the lateral displacement of the emergent ray depends.
A ray of light is incident on a glass-slab from air at an angle . Thickness and refractive index of glass-slab are‘t’ and ‘μa ’ respectively, Find the lateral displacement of the emergent ray respective to incident ray.