Question

Where should an object be placed so that a real and inverted image of the same size is obtained by a convex lens ?

• A. At the focus of the lens
• B. At twice the focal length
• C. At infinity
• D. Between the optical centre of lens and its focus

Answer 1

The correct option is B At twice the focal length

$Answer:-$ B option

here AB and A'B' are same heights(same size). From the diagram we can say that the object should be placed at twice the focal length of the lens.