In the diagram, the ray is incident parallel to the principal axis. Redraw the diagram, showing the reflected ray.

When two plane mirrors subtend an angle theta between them, then a ray of light incident parallel to one of them retraces its path afer n reflections such that ntheta=c (where c is constant) If the angle between mirrors is 60^(@) . Then light ray retraces its path after n reflections where n is

The refractive index of transparent cylindrical rod is (2)/(root_3) . As shown in the figure the ray i incident at the mid point of its one end. For which angle of incidence, the ray become parallel to the length of rod ?

Draw the ray diagrams showing incident ray and reflected ray for (1) a ray parallel to the principal axis and (2) a ray passing through the principal focus of a concave mirror.

Draw the ray diagrams showing incident ray and reflected ray for (1) a ray parallel to the principal axis and (2) a ray passing through the principal focus of a concave mirror.

A ray of light is incident on a concave mirror . It is parallel to the principal axis and its height from principal axis is equal to the focal length of the mirror. The ratio of the distance of point B to the distance of the focus from the centre of curvature is (AB is the reflected ray)

Assertion:- Paraxial rays are always parallel to the principal axis. Reason:- A parallel beam parallel to principal axis converges at the focal point.

A ray is incident at an angle 38^@ with a mirror. The angle between normal and reflected ray is ........... .

A mirror is inclined at an angle of theta with the horizontal. If a ray light is incident at an angle theta as shown , then the angle made by reflected ray with the horizontal is

Two mirrors are inclined at angle theta as shown in figure. Light rays are incident parallel to one of mirrors. Light will start retracing its path after the reflection if