An object is placed in front of a converging lens at a distance equal to twice the focal length `f_(1)` of the lens. On the other side of the lens is a concave mirror of focal length `f_(2)` separated from the lens is a concave mirror of focal length `f_(2)` separated from the lens by a distance `2(f_(1)+f_(2))`. Light from the object passes rightward through the lens, reflects from the mirror, passes leftward throught the lens, and forms a final image of the object.

Options

A. The distance between the lens and the final image is equal to `2f_(1)`.
B. The distance between the lens and the final image is equal to `2(f_(1)+f_(2))`
C. The final image is real, inverted and of same size as that fo the object.
D. The final image is real, erect and of same size as that of the object.

Answer

a,c.

Explanation

`I_(1)` is image of O through lens.
`I_(2)` is image of `I_(1)` through mirror.
`I_(3)` is image of `I_(2)` through lens.
`I_(3)` is of same size of O and inverted w.r.t. O.