Question

When light rays are incident on a rectangular glass slab obliquely, the angle of incidence is the angle of emergence.

• A. greater than
• B. equal to
• C. lesser than

Answer 1

The correct option is B equal to

When the light ray is incident obliquely on the interface of a glass slab, the emergent ray becomes parallel to the incident ray. Therefore, the angle of incidence is always equal to the angle of emergence.