Question

if the glass slab is of the following shape and the experiment is performed as above will the effect be the same here S1 and S2 are slab surface parallel to each other​

Answer 1

In a glass slab opposite sides are parallel. The angle of refraction becomes the angle of incidence in the second face. The emergent ray bends in such a way that the angle of incidence becomes the angle of emergence. In this case the incident ray and the emergent ray will not be parallel to each other