Name the spherical mirror which can produce a virtual and diminished image of an object.
A convex mirror is the only spherical mirror which can produce a virtual and diminished image of an object.
Explanation
A convex mirror is a spherical mirror that always produces virtual, erect, and diminished images irrespective of the distance between the object and the mirror.
While a concave mirror is a spherical mirror that can produce a virtual, erect, and magnified image, but not a virtual, erect, and diminished image.
Among all the six cases of image formation by a concave mirror, it forms a real and inverted image in five cases, only in one case it forms a virtual erect and enlarged image of an object, which is when the object is placed between pole $(P)$ and focus $(F)$.
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