Question

How can you show that if a ray enters a rectangular glass slab obliquely and emerges from the opposite face, the emergent ray is parallel to the incident ray​

Answer 1

Answer:

u should expand the incident ray by construction and will see that they are parallel. 

Explanation:

fol low for future help and brainalist plz

Answer 2

Answer:

When light rays travel from air into glass or from air into water, it bends towards normal. This is because the speed of light rays decrease while travelling from air into glass or water.