Question

Mention the nature, position and size of the image formed in this case.

State the sign of the image distance in this case using the Cartesian sign convention.

An object is placed in front of a convex mirror at infinity. According to the New Cartesian Sign Convention, the sign of the focal length and the sign of the image distance in this case are respectively :

Assertion (A): A convex mirror cannot produce a real image of a real object, no matter how far the object is placed from the mirror. Reason (R): For a convex mirror the focal length is positive and the object distance is negative; the mirror formula then always gives a positive image distance, which corresponds to a virtual image formed behind the mirror.