Question

A convex lens of focal length 16 cm forms a real image double the size of the object. The distance of
the object from the lens is

a) 8 cm
b) 16 cm
c) 24 cm
d) 32 cm
​

Answer 1

The lens forms a real image double the size of the object, the magnification of the lens is 2. To find, The object distance. So, the object is placed at a distance of 8 cm from the lens.

Answer 2

u = 8cm

is the correct answer.