Question

A convex lens of focal length $F_1$ forms a real and inverted image of an object. If the size of the image is the same as that of the object, the object is placed

• A. at $2F_1$
• B. between $F_1$ and $2F_1$
• C. between optical centre and $F_1$
• D. between $-\infty$ and $2F_1$

Answer 1

The correct option is A at $2F_1$


From the figure we can say that a convex lens forms a real, inverted and same size image, when object is placed at position $2F_1$.