onsider the following optical system consisting of a thin lens of focal length |f|=40 ?cm, ?of a piece of glass whose curved face has a radius of curvature |R|=25 ?cm and a concave mirror with a radius of curvature of 30 ?cm. ?Calculate the characteristics (position, ?nature and magnification) ?of the image of an object located to the left of the thin lens throughout the system. We give that a =20 ?cm, ?b =28 ?cm, ?c =3 ?cm and d =205 ?cm.

C O Miroir