After tracing the path of rays of light through a glass slab for three different angles of incidence, a student measured the corresponding values of angle of refraction ‘r’ and angle of emergence ‘e’ and recorded them in the table given below:The correct observations are:(a) I and II(b) II and III(c) I and III(d) I

(d) I, II, and III

Explanation

For light rays passing through a glass slab, the following conditions should hold true:

1. $\angle i\approx \angle e\ and\ \angle r<\angle i$

2. Also, the angle of refraction increases with increase in incident angle.

Both of these conditions are satisfied in all three observations.

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Updated on: 10-Oct-2022

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