Question

why does a light ray incident on a rectangular glass slab immersed in any medium emerges parallel to itself ? explain using a diagram

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.

Explanation:

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Answer 2

$\large\bf\red{Explanation✓}$

When light ray enters denser medium from the rarer medium it bends towards the normal In this case extent of bending of the ray at the opposite parallel is the same. Hence emergent ray is parallel to the incident ray.