Image formed by a convex spherical mirror is:

A dice is place with one of its edges parallel to the principal axis between the principal focus and the centre of curvature of concave mirror. Then the final image has the shape of:

Two adjacent walls and the ceiling of a rectangular room are mirror surfaced. The number of images of himself that an observer sees is:

A diminished virtual image can be obtained only in:

A convex mirror has a focal length f. A real object is placed at a distance f in front of it. The mirror produces an image at: