問題詳情
(11)An astronomical telescope has an objective of 60-cm focal length as shown in the right figure. The eyepiece has a focal length of 4.5 cm. How far must these lenses be separated when viewing an object 300 cm away from the objective?
(A)72.5 cm
(B)76.0 cm
(C)79.5 cm
(D)83.0 cm
(E)86.5 cm
參考答案
答案：C
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中