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 op)3edp*g12 ev +z )lnowzl -ttbjective lens of focal length 1.4 mm chsvo/b2 (ij8slizs li65n v2*0k *xpand an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.5 mm from the objectisvs 6kx lon5cp(*bhvsz2 jii0i*82/ lve. 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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