Question

+(15) Discuss the refraction of light through a glass slab.
Show that the emergent ray is parallel to the
incident
ray
but laterally displaced w.r.t. it​

Answer 1

Answer:

The refracted ray BC is incident on the face SR at an angle of incidence i2. The emergent ray CD bends away from the normal at an angle of refraction r2. Thus, the emergent ray CD is parallel to the incident ray AB, but it has been laterally displaced by a perpendicular distance CN with respect to the incident ray