Question

In your laboratory you trace the path of light rays through a glass slab for different values of angle of incidence (∠i) and in each case measure the values of the corresponding angle of refraction (∠r) and angle of emergence (∠e). On the basis of your observation your correct conclusion is : (a) ∠i is more than ∠r, but nearly equal to ∠e (b) ∠i is less than ∠r, but nearly equal to ∠e (c) ∠i is more than ∠e, but nearly equal to ∠r (d) ∠i is less than ∠e, but nearly equal to ∠r

Answer 1

Answer:

the question is improper

Explanation:

make it clear

Answer 2

Answer:

option a:  ∠i is more than ∠r, but nearly equal to ∠e.

Explanation:

When a ray of light passes through glass slab,it undergoes refraction from rarer medium to denser medium so it moves towards normal

hence ∠i >∠r

the ray on striking the other surface will undergo again refraction from denser medium to rarer medium and moves away from normal.

As the light ray shifts laterally as it enters and emerges out of the glass slab.

so ∠i=∠e

hence option a is correct