Question

5. In the experiment of refraction through a glass slab, the angle of incidence
should be less than 90°. Why?​

Answer 1

Answer:

The angle of refraction is less than angle of incidence because light is travelling from rarer to denser optical medium. The lateral displacement remains the same for different angles of incidences.

Answer 2

Answer:

because at 90° it will create infinite number of refractions.

Explanation:

In the experiment of refraction through a glass slab, the angle of incidence

should be less than 90° because at 90° it will create infinite number of refractions.