Optical Instruments (id: 1b59d9183)

本题目来源于试卷: Optical Instruments，类别为 IB物理学

[填空题]
An achromatic lens is made of tw8:q3z o8crkvdkq m* 8to very thin lenses, pl9rez k274mf;bii9w v xaced in contact, that have focal lengths of 7mz9 xw9 42biv;efrki$f_1=-28\mathrm{~cm}$ and $f_2=+23\mathrm{~$cm$}.$
(a) Is the combination converging or diverging?  ----待选择----convergingdiverging 
(b) What is the net focal length?    m

参考答案:
空格1: converging  空格2: 1.3±2% 


本题详细解析:

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