Question

While tracing the path of a ray of light passing through a rectangular glass slab a student tabulated his observations as given below:

S.NO.	∠i	∠r	∠e
I	60°	40°	61°
II	50°	36°	51°
III	40°	28°	39°
IV	30°	20°	31°

The correct observations is:

(A) I

(B) II

(C) III

(D) IV

Answer 1

Using Snell’s law, sin i/sin r = n₂/n₁, check the ratio of the sine values of i and r which gives 1.5 (we know, n₂=1.5 and n₁=1) will be the answer.

The Correct Answer is D