Question

Why does a light ray travelling through air incident on a rectangular glass slab emerges parallel to the incident ray?

Answer 1

Answer:

light ray incident on a rectangular glass it gets refracted by glass slab. After the refraction it comes out from glass. ... Since, the glass slab is rectangular and both sides of the glass slab have the same medium. The light refracts in such a way that incident and emergent rays are parallel.

Answer 2

light ray incident on a rectangular glass it gets refracted by glass slab. After the refraction it comes out from glass. ... Since, the glass slab is rectangular and both sides of the glass slab have the same medium. The light refracts in such a way that incident and emergent rays are parallel.