Question

Where should an object be placed in front of a convex lens to get a real image of the size of the object?

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

Answer 1

The correct option is C At twice the focal length

The object should be placed at twice the focal length in front of a convex lens to get a real image of the size of the object.