Fill ups
A ray of light directed towards the focus of the convex mirror after reflection from the mirror becomes………….. .

The refractive index of the amterial of a prism is sqrt2 and its refracting angle is 30^@ .One of the refracting surface of the prism is made a mirror inwards.A beam of monochromatic light entering the prism from the other face will retrace its path after reflecting from the mirrored surface,if its angle of incidence on the prison is

A mirror and a source of light are situated at the origin O and at a point on OX, respectively. A ray of light from the sources strikes the mirror and is reflected. If the direction ratios of the normal to the plane are 1, -1, 1, then find the DCs of the reflected ray.

Parallel rays incident on a mirror,after reflection converge at a point, then the mrirror will be …… .

A ray of light falling normal to the mirror returns along the same path.Why?

A ray of light is reflected at angle 30^@ .If the angle of incidence becomes double,then angle of reflection will be

An objects is placed at a distance equal to focal length of convex mirror.If the focal length of the irror be f,then the distance of the image from the pole of the mirror is:

Two mirrors meet at right angles . A ray of light is incident on one at an angle of 30^@ as shown in figure .Draw the reflected ray from the second mirror.

In Fig.2.56 ,the direct image formed by the lens(f=10cm) of an object placed of O and that formed after reflection from the spherical mirror are formed at same point.What is the radius of curvature of the mirror? .

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