Question

Solve it please
Question 38.

Answer 1

Answer is 90°

Because the angle of refraction (as the angles of incidence or reflex) is measured towards the normal to the surface.

A light ray perpendicular to the surface of incidence is parallel to the normal at surface, hence the angle is 0.

Answer 2

The Answer is :-

(C) 90°

As when light incident perpendicular in the medium with respect to normal the light doesn't refract.

As per the Law Of Refraction :- Angle of incidence is equal to angle of refraction  with respect to normal.

So, If angle of incidence is 90° so angle of refraction will be 90° too.

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