Explain how a parallel beam of light on reflection from a concave mirror gets converged.

Explain how a parallel beam of light on reflection from a convex mirror gets diverged.

Explain how a parallel beam of light on refraction from a convex lens gets converged.

Explain how a parallel beam of light on refraction through a concave lens gets diverged.

Using Huygens' principle and drawing the skteches of wavefront,show how a parallel beam of light is reflected from a polshed surface and hence verify that anglei=angler .

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.

Suppose that one half of the reflecting surface of a concave mirror is covered with black soot.How will the image of an object placed in front of the mirror be affected?

A concave mirror of focal length 20 cm and a convex mirror of focal length 15 cm are placed 50 cm apart,such that the two mirrors face each other .An object is placed exactly midway betwen them.Find teh nature and position of the image formed by reflection first at the concave mirror and then at the convex mirror.

Where should an object be placed with respect to a concave mirror to get real and enlarged image? Show with the help of ray diagram.

Explain the sketches the formation of a real enlarged image for a concave mirror

The refractive index of a material of a concave lens is n_1 . It is immersed in medium of refractive index n_2 . A parallel beam of light if incident on the lens. Trace the path of the emergent lays when n_2 = n_1