摘要
根据光学中杨氏双缝干涉实验原理设计出超声波双缝干涉测量声速的实验装置.运用波的干涉原理,将声波接收器接收到的干涉信号输入到示波器,通过示波器来显示干涉极大和干涉极小现象,利用分光计的双游标读数原理测量干涉极大和干涉极小对应的θ角.通过实验数据计算得出干涉极大和极小对应的声速分别为(336.2±0.3)m/s,(338.8±0.2)m/s.
According to the theory of Young double-slit interference in optics,an experimental device for measuring the ultrasonic velocity with double-slit interference was designed.Based on the principle of wave interference,an interference signal of the acoustic wave was input to the oscilloscope to display maximum and minimal interference phenomena,and the angle between the maximum and the minimum interference were measured by the double-cursor reading principle of the spectrometer.Sound velocity calculated from the experimental data were（336.2±0.3）m/s,（338.8±0.2）m/s,corresponding to the maximum and minimum interference,respectively.
作者
骆敏
骆泽如
余观夏
林杨帆
LUO Min;LUO Ze-ru;YU Guan xia;LIN Yang fan(Physics Teaching Laboratory,Nanjing Forestry University,Nanjing 210037,China;Nanjing No.1 Middle School,Nanjing 210001,China)
出处
《物理实验》
2018年第5期17-19,共3页
Physics Experimentation
基金
南京林业大学2016年高等教育研究课题(No.163101152)
大学生创新训练计划项目(No.2017NFUSPITP274
No.2016NFUSPITP162)
南京林业大学中外合作办学高水平示范性建设项目(No.164101006)
关键词
双缝干涉
超声波
声速
不确定度
double slit interference
ultrasonic
sound velocity
uncertainty
