弦振动实验的改进

Improvement of String Vibration Experiment

本文简要地分析了实验室用弦音计做弦振动实验时,在精确度和实验操作上所存在的不足,对实验做出了些许改进:实验前,利用水平仪将弦线与杠杆调节水平,在水平杆上放置轻小激光笔,并在屏上做好该时刻激光点的位置,去掉水平仪后,只需要每次将激光光点调节到初始光点位置,就能快速地使弦线与杠杆保持水平。通过改进实验,使实验操作更方便,使实验误差至少降低了0.5%。

In this paper,we briefly analyze the shortcomings of the experiment on the precision and experimentaloperation of the string instrument in the laboratory,and make some improvements on the experiment. Before theexperiment,we used the horizontal instrument to adjust the string and the lever.At the same time,we placed a light laserpointer on the horizontal bar,then marked the position of the laser pointer on the screen.After removing the level,wewill just need to adjust the laser light point of the position of the initial point of light every time,so that the string and thelever can be kept ata level quickly.The experiment is more convenient,and the experimental error is reduced by at least0.5%,by improving the experiment.