本题目来源于试卷: Physics Unit23: Light and Geometric Optics，类别为 通用国际物理
[单选题]
A biconvex lens is foe2/lwvbicbvo vynr 66.fp x:* 18sdc+rmed by using a piece of plasy3o;ws;)+4rg /wm yjrc,,kyily xbx 0 tic (n = 1.70). The radius of the front surface is 20 cm and the radius of the back surface is 30 cm. What is th;yo ljxir,by, +s 03xg;y 4ywmk/) wrce focal length of the lens?
A. $17 \; cm$
B. $86 \; cm$
C. $-86 \; cm$
D. $-17 \; cm$
参考答案: A
本题详细解析:
暂无
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