A concave lens with focal length magnitude 18 cm is used to produce an upright image…
PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction
Problem
A concave lens with focal length magnitude 18 cm is used to produce an upright image that is exactly one-third the height of the object. How far from the lens must the object be placed?
(a) 18cm
(b) 24cm
(c) 36cm
(d) 72cm