Question

4.A ray of light is incident normally to the surface of a glass slab placed in air give angle

of incidence and angle of refraction in this case.
I will branist​

Answer 1

Answer:

The ray of light which is incident normally on a plane glass slab passes undeviated. That is such a ray suffers no bending at the surface because here the angle of incidence is 0°. Thus if angle of incidence ∠i= 0°, then the angle of refraction ∠r = 0°.

Explanation:

Mark me as the brainliest..

Answer 2

If a ray of light is incident normally, angle of incidence will be zero as all angles are measured from normal.

As, ∠i=∠r

so, if a ray of light is incident normally on the glass slab, then angle of refraction will be 0  

0

 Pls mark me as brainliest na