(a) Write relation between , u v f for lenses and for mirrors, where , uvf are object distance, image distance and focal length respectively. (b) The magnification produced by a concave mirror is m 4 =+. Write the information about the image given by this statement. (c) Draw a ray diagram for the following and show the formation of the images in case of concave mirror when the object is placed: (i) between the pole and focus point. (ii) at the centre of curvature.