Question

Describe the process of refraction through a rectanguler glass slab. Hence, prove that, incident
ray and emergent rays are parallel to each other.​

Answer 1

Answer:

I don't know how to do it and explain it

Answer 2

Answer:

Refraction through a Glass Slab

First, the ray of light travels from air to glass. Hence , it travels from a rarer medium to a denser medium. Hence, it travels from a denser medium to a rarer medium. We observe that, the original incident ray and the emergent ray are parallel to each other.