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 )eed0s-/: vhvpgeia wbu a(2.made of two very thipl;sgx5hu+n( lm9 jdq4xbx.9m d7nqk3 t+ if- n lenses, placed in contact, that havedbmxi-+9 qs; kh.7pxu l5j nqmg( +l ndt439xf focal lengths of $f_1=-28\mathrm{~cm}$ 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% 


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