Question

A biconvex lens forms a real image of an object placed perpendicular to its principal axis. Suppose the radii of curvature of the lens tend to infinity. Then the image would
A. Disappear
B. Remain as real image still
C. Be virtual and of the same size as the object
D. Suffer from aberrations

Answer 1

Correct Answer - C
`(1)/(f)=(mu-1)((1)/(R_(1))-(1)/(R_(2)))`
For biconvex lens `R_(2)=-R_(1)`
`:. (1)/(f)=(mu-1)((2)/(R))`