Question

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

1) between optical centre and F1

2) at F1

3) between F1 and F2

4) at F2​

Answer 1

Answer:

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

2F1 .