Question

After tracing the path of rays of light through a glass slab for three different angles of incidence, a student measured the corresponding values angle of refraction r and angle of emergence e and recorded them in the table given below:S.
No
1
2
3

∠i
30°
40°
50°

∠i
20°
25°
31°

∠e
31°
40°
49°

The correct observations are:
(A) I and II
(B) II and III
(C) I and III
(D) I, II and III

Answer 1

After tracing the path of rays of light through a glass slab for three different angles of incidence, a student measured the corresponding values angle of refraction r and angle of emergence e and recorded them in the table given below:S.

No

1

2

3

∠i

30°

40°

50°

∠i

20°

25°

31°

∠e

31°

40°

49°

The correct observations are:

(A) I and II

(B) II and III

(C) I and III

(D) I, II and III

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