Question

where should an object be placed in front of a convex lens to obtain a real image of thr same size of the object​

Answer 1

Answer:

At twice the focal length of the lens infront of it. So if the lens has a focallength of 20 cm, the object must beplaced 40cm in front of the lens whichwill then form an inverted image of thesame size as the object, 40 cm behind the lens.

Answer 2

Answer:

the object should be placed at distance of twice the focal length in front of the convex lens in order to get real image and of same size