JAMB - Physics (1995 - No. 27)
A real object is placed at a distance ucm in front of a curved mirror of focal length fcm. If the image is upright and magnified, then the mirror is
convex and u =2f
concave and u = 2f
convex and u = f
concave and u = f
Vysvětlení
-The image formed by a concave lens is always virtual, erect and magnified.
-The image formed by a concave mirror can be real or virtual, enlarged or diminished, and erect or inverted, depending upon the distance of the object from the mirror