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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
Solution
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
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