Question

If 'i' is the critical angle, is the angle of its refracted ray.

• A. $0^o$
• B. ${90}^o$
• C. ${180}^o$
• D. ${45}^o$

Answer 1

The correct option is B ${90}^o$

Critical angle is the angle of incidence in the denser medium, corresponding to which the refracted angle is ${90}^o$. When the angle of incidence is more than the critical angle the ray gets reflected internally.