What is the angle of reflection, when a ray of light is incident normally on a plane mirror?

What is the angle of reflection when a ray of light is incident normally to the mirror?

State Huygens' principle and use it to describe the process of reflection of a parallel beam of light incident on a plane mirror obliquely with the help of a labelled diagram.Prove that the angle of incidence is equal to the angle of reflection.

What is the angle of incidence ,when a ray of light falls on the spherical mirror from its centre of curvature?

Calculate the angle of emergence (e) of ray of light incident normally on the face AC of a glass prism ABC of refractive index sqrt 3 . How will the angle of emergence change qualitatively if the ray of light emerges form the prism into a liquid of refractive index 1.3 instead of air?

A right angled isosceles glass prism is made from glass of refractive index 1.5.Show that a ray of light incident normally on the hypotneuse of this prism is deviated through 180^@ .

What is the angle of incidence when incident ray falls normal to the mirror?

Calculate the critical angle for a glass-air surface,if a ray of light which is incident in air on the surface is deviated through 15^@ ,when its angle of incidence is 40^@ .