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^@`.

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

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

The photoelectric emission from a surface starts only when the light incident upon the surface has certain minimum:

The critical angle of light passing from glass to air is minimum for

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^@ .

A right angled isosceles glass prism is made from glass of refractive index 1.5.Show that a ray of light incident normally on one of the equal sides of this prism is deviated through 90^@ .