Question

Which of the following is the best set-up for tracing the path of a ray of light through a rectangular glass slab?



(1) A
(2) B
(3) C
(4) D

Answer 1

While tracing the path of the light ray passing through a rectangular glass slab, the pins should be pointed at a distance of at least 6 cm and the angle of incidence should be kept around $45°$. Because it will provide a better line sight to observe the path of the ray, from the other side of the slab.

Hence, the correct answer is option 2.