A woman can read the large print in a newspaper only when it is at a distance of 57 cmor more from her eyes.
(a) Is she nearsighted (myopic) or farsighted (hyperopic), and what kind of lens is used in her glasses to correct her eyesight?
(b) What should be the refractive power (in diopters) of her glasses (worn 2.0 cmfrom the eyes), so she can read the newspaper at a distance of 24 cmfrom the eyes?