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 foca0; cjo 6 1u +qgzvqf:mu:3t;jzsg+sv el length 1.4 mm and asm:7ot/ xpjtz:se2w:l 9rtl e/6i -umn eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample ilzr:/6-lmx etw e m/ti :9tusp27s :jos 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
| 
