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 ojdlh5)e v+ 8d4ibqt(e bjectivfw-b),d3d (xhx: *isg. wdoase lens of focal length 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestraing aw b( hdo:dx*x,-)i3.sdsfw. 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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