By definition, the magnification of a lens is given by the ratio of the image height to the object height, m= . As we discovered in the previous lab, using a simple geometry argument (and the correct sign conventions for lenses and mirrors), the magnification can also be written in terms of the object and image distances as m= - . Considering your answer to the previous question, what would be the magnitude of the magnification (to the nearest tenth) of an object placed 44 cm in front of a mirror or lens with a positive focal length of 18 cm?