Question

A convex lens of focal length 10cm is painted black at the middle portion as shown in figure . An object is placed at a distance 20cm from the lens. Then,

A. only one image will be formed by the lens
B. the distance between the two images formed by such a lens is 6mm
C. the distance between the images is 4mm
D. the distance between the images is 2mm

Answer 1

Correct Answer - a.
Only one image will be formed by this lens system because optic axis of both the parts coincide. Two images would have formed if their optic axis were different.