The nature of the virtual image of an object formed in a concave lens is:
There are two cases in which an object can be placed in front of the concave lens :
(i) When the object is at infinity
Nature of the image → virtual and upright.
Size of the image → Highly diminished.
(ii) When the object is at any position between infinity and optical centre :
Nature of the image → Virtual and upright.
Size of the image → Diminished.