Question

Study the following diagrams in which the path of a ray of light passing through a glass prism as traced by four students P, Q, R and S is shown:

The student who has traced the path correctly is

(A) P

(B) Q

(C) R

(D) S

Answer 1

Student Q has traced the path correctly.

When light is travelling from a rarer medium to a denser medium, it bends towards the normal to the surface, while the light from a denser medium to a rarer medium bends away from the normal to the surface.

Hence, the correct option is B.