1. Shiny lawn spheres placed on pedestals are convex mirrors. One such sphere has a diameter of 40 cm. A 12 cm robin sits in a tree 1.5 m from the sphere. a) Where is the image of the robin? b) How long is the robin's image? 2. 1/f = 1/do + 1/di 3. a. 1/f = 1/do + 1/di di = dof/1/f = do - f = 150(10)/ 150 -10 = 10.71 cm b. m = hi/ho = di/do hi = ho (di/do) = 12(-10.71/150) = -0.857 cm I'm not sure if this is right.