摘要
本文根据对物距－像距法测凹透镜焦距存在的系统误差分析，指出实验安排上应选择长焦距、对称的双凹透镜．
The systematic errors in the experiment of concave lens focal length measurem ent by objective distance image distance method for three different shapes of c oncave lens are compared by calculation.It is pointed out that the symmetric dou ble concave lens is most suitable to be chosen.
关键词
凹透镜
焦距测量
物距-像距法
物理实验教学
concave lens
focal length measurement
objective distance image distance meth od.
