金属线膨胀系数的光学方法测定

利用一种光学方法测量金属的线膨胀系数,基于迈克尔逊干涉原理的光学方法在测量长度的微小改变量时具有数据精确、结果可靠、误差较小等优点。具体讲述了此实验的实验原理、实验装置、实验方法和测量结果,并对测量结果进行分析讨论,发现实验结果与理论值的相对误差较小,仅为1.2%,较小的误差也说明了此方法测量金属线膨胀系数的可行性,此实验有利于学生对知识点的掌握,结合实验室现有的其他仪器,还可以培养学生的动手操作能力和创新意识。

An optical method is used to measure the linear expansion coefficient of metals.The optical method based on Michelson's interference principle has the advantages of accurate data,reliable results and small error when measuring the small change of length.Specific about the principle of the experiment of the experiment,experiment device,experiment method,and the measured results,and the measurement result analysis,found that the experimental results with the theoretical value of relative error is small,only 1.2%,smaller error and this method shows the feasibility of measuring metal linear expansion coefficient,this experiment is conducive to students mastery of knowledge points,the existing other instruments in the laboratory,also can cultivate students'practical operation ability and innovation consciousness.