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. |
∠i |
∠r |
∠e |
|
I |
30° |
20o |
31o |
|
II |
40o |
25o |
40o |
|
III |
50o |
31o |
49o |
The correct observations are:
A)
B)
C) I and III
D) I, II and III
-
I and II
-
II and III
-
I and III
-
I, II and III
Solution
D.
I, II and III
For light rays passing through a glass slab, the following conditions should hold true:
- Also, Angle of refraction increases with increase in incident angle.
The given observations satisfy both these conditions.
