Question

What will be the angle of refraction for a light ray incident normal to the surface? *
90°
60°
30°
0°

Answer 1

Answer:

correct answer is 0.

Explanation:  

Angle of incidence = Angle of refraction

Here, since the ray is incident normally, angle of incidence is equal to 0  

0

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Answer 2

Answer:

0°

I hope this will help you