Question

An object is placed in front of a spherical mirror at a very far distance and its image is observed to be formed highly diminished, virtual and upright. The mirror is

• A. concave
• B. convex
• C. plane mirror
• D. either plane mirror or concave mirror

Answer 1

The correct option is B convex


Object is placed at very far distance i.e $\infty$. Thus, a highly diminished image will be formed at focus.
Since, image is virtual and upright, it will be formed behind the mirror and therefore, it is a convex mirror.