Question

A ray of light is normally incident on one face of an equilateral glass prism. What is the angle of refraction from the first face of the prism ?

• A. ${90}^o$
• B. ${45}^o$
• C. ${30}^o$
• D. $0^o$

Answer 1

The correct option is D $0^o$

When a ray is incident normally, the angle of incidence is $0^o$ and hence the angle of refraction will also be $0^o$