A convex lens and convex mirror are placed co axially and separated by distance . The focal length of both is each. A point object is placed at a distance of from the lens. Then the value of so that image on the object itself is
Step 1:Given data:
Distance between the convex mirror and convex lens=
The focal length of the convex lens() =
The focal length of the convex mirror is ()=
The distance of the image placed from the lens is =
The radius of curvature of mirror=
Step 2:Formula applied
According to Lens' formula
Step 3:Solution
As the focal length of a concave mirror is always negative hence ()
Therefore the distance between the mirror and the lens should be for the path to be retraced.