In the following, which mirror makes diminished and virtual image of an object?PlaneConcaveConvexAll of the above

The mirror that makes a diminished and virtual image of an object is a Convex mirror.

Here's why:

1. Plane Mirror: A plane mirror always forms a virtual image that is the same size as the object. Therefore, it cannot form a diminished image.

2. Concave Mirror: A concave mirror can form both virtual and real images. However, it only forms a virtual image when the object is placed very close to the mirror. In this case, the image is magnified, not diminished.

3. Convex Mirror: A convex mirror always forms a virtual and diminished image, regardless of the position of the object. This is because the mirror diverges light rays, making them spread out and appear as though they're coming from a smaller object.

4. All of the above: As explained above, not all mirrors can form a diminished and virtual image. Only the convex mirror has this ability.

So, the correct answer is Convex mirror.