Question

. "During refraction of light through the glass slab, incident ray and emergent ray are parallel each other." Explain.​

Answer 1

Answer:

because refraction takes place at two parallel refracting surfaces

Also the angle of incidence becomes equal to the angle of emergence

Answer 2

Emergent ray is parallel to the incident ray, after the refraction of Incident ray through a glass slab because the angle of incidence is equal to the angle of emergence and they are also the alternate interior angles.