Question

The figure shows the two cases- light rays passes through different glass slabs. In which case, the light will get refracted only once? ​

Answer 1

ANSWER : PARALLEL

Explanation:

the ray of light is incident on the glass slab the ray get refracted twice and comes out from the other surface as the emergent ray.The emergent ray shows a lateral shift from the original path of the light. When the light is passing through the glass its velocity decreases and when comes out of the glass slab its velocity increases and the light ray traces the same direction in the air.

Hence incident and emergent rays are parallel to each other.  

solution