Question
A ray of light, incident obliquely on a face of a rectangular slab placed in air, emerges from the opposite face parallel to the incident ray. State two factors on which the lateral displacement of the emergent ray depends.
Solution
Lateral displacement of an emergent ray depends on:
(i) Angle of incidence,
(ii) Thickness of the glass slab, and
(iii) Refractive index of the slab material.
