A stamp collector is viewing a stamp with a magnifying glassheld next to her eye. Her near point is 25 cm from her eye.
(a) What is the refractive power of a magnifyingglass that has an angular magnification of 6.9 when the image ofthe stamp is located at the near point?
(b) What is the angular magnification when the image of the stamp is 49 cmfrom the eye?