(a) What is a virtual image? (b) When is a virtual formed? [3 MARKS]
A virtual image formed by a concave mirror is always (a) ____ and a virtual image formed by a convex mirror is always (b) _____ .
A virtual image of an object is formed by a concave lens. The lens is then coupled (placed in contact) with a convex lens. A virtual image is again formed. The image, now