A convex lens of focal length 0.12 m produces an image, which is three times as long as the object. The distance between the object and the lens for a real image

Step-by-step solution

Magnification produced by the lens B= ₀ N i 2 r m= v u =-3 v=-3 u Applying lens of formula, we have array ll & 1 v - 1 u = 1 f & 1 -3 u - 1 u = 1 0.12 or & -1-3 3 u = 100 12 = 25 3 or & - 4 3 u = 25 3 array or u=- 4 25 m=0.16 ~m