Question

during refraction of light through the glass slab,incident Ray and emergent ray are parallel to each other.Explain

Answer 1

Explanation:

Since the refracting surfaces are parallel to each othe the emergent rays are parallel. ... Since the surfaces are parallel the ray inside the glass falls at the other surface at angle r and therefore the ray emerges at angle i that is the angle of incidence. Therefore the incident ray is parallel to the emergent ray