A convex lens T is used to form an image whose size is one fourth that of size of object. Then the object distance is

Step-by-step solution

Magnification, m =- 1 4 (Since the image is real and inverted, it is taken as negative) aligned & m = v u =- 1 4 & v =- u 4 aligned Lens formula, 1 v - 1 u = 1 f aligned & - 4 u - 1 u = 1 f & u=-5 f aligned