Question

At a particular angle of incidence in the denser medium, the refracted ray emerges along the surface. This angle is known as

• A. Angle of incidence
• B. Angle of refraction
• C. Critical angle
• D. Normal angle

Answer 1

The correct option is C Critical angle

Critical angle:- The angle of incidence when a ray of light is passing from an optically denser medium to an optically rarer medium for which angle of reflection becomes ${90}^o$ that is refracted rays goes along surface.