The image of an object is found to be upright and reduced in size. What type of mirror or lens is used to produce such an image?
Concave mirror and Converging lens is used to produce image which is upright and reduced in size. For a convex mirror revealed that the image of the object was virtual, upright, reduced in size and located behind the mirror. The surface may be convex .Convex mirrors reflect light outwards, therefore they are not used to focus light.