本题目来源于试卷: Physics Unit25: Optical Instruments，类别为 国际高中通用物理
[单选题]
A microscope has an objective lens of focal lengthb +dg2sdm2 fwy, k0y+n 1.4 mm and an eyd-t5eo8 qtme+jn c8t2q7)ok sepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sam +7etj8t)tn2okm5ocq 8-ed qsple is placed 1.5 mm from the objective. How far apart are the lenses?
A. $20 \; mm$
B. $21 \; mm$
C. $23 \; mm$
D. $41 \; mm$
参考答案: D
本题详细解析:
暂无
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