1. Lens and mirror A bright object is 20 cm from a thin lens with focal length f= 12 cm. 25 cm behind the lens is a convex spherical mirror with radius of curvature r = 20 cm, as in the figure below (not to scale). F F C a) Draw a ray diagram for the lens only and locate the image formed by the lens. Calculate the image distance. Where is the lens image relative to the mirror? b) Taking the mirror into account, calculate the position of the final image formed by the mirror. Is the final image real or virtual? Calculate the magnification. Is it upright or inverted relative to the original object? Larger or smaller