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 focv1 :zza .cdg/e:jzz;g hhkh8 :y 8:m1lsfimxr+-3f9zv t1 l18sbyzag al length 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.5 mm from the objective. How far a+8-8am8 s i 1b k3yxvlhm1ryt ::flzhzg1fh9spart 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
| 
