Question

Four students A, B, C and D showed the following traces of the path of a ray of light passing through a rectangular glass slab.



The trace most likely to be correct is that of student:
(1) A
(2) B
(3) C
(4) D

Answer 1

When a ray is passed through a rectangular glass slab, it bends towards the normal and when it emerges from the glass slab it bends away from the normal and becomes parallel to the incident ray but with a lateral shift. A laterally shifted ray parallel to the incident ray can only be seen in diagram B.

Hence, the correct answer is option 2.