Question

2 characteristic of emergent ray when a ray of light passes through glass slab

Answer 1

1- in refraction through a glass slab, the emergent ray is parallel to the incident ray.
2- Angle of incidence is greater than angle of refraction.

Answer 2

1.*The emergent ray is parallel to the incident ray.However it is displaced, relative to the incident ray, by an amount.

2.*The angle of emergence (formed by the emergent ray and normal)= the angle of incidence (formed by the incident ray and normal).