本题目来源于试卷: Physics Unit25: Optical Instruments，类别为 通用国际物理
[单选题]
A microscope has an os ytd80xg: m5 zpk4fd8bjective lens of focal len1d ,o qgwmk g/ 7xmj/4txu-5ttgth 1.4 mm and an eyepiece of focal length 20 mm, a7xdtk/,umt45wx1- /o mgqgjtdjusted for minimum eyestrain. A blood sample 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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