摘要
钼酸铅晶体是一种声光性能优异的新型功能材料,将其引入光拍法测量光速实验中,介绍了光拍法测量光速的基本原理,分析了在实验中所具有的优势以及对实验的改进。声光器件性能的优劣对光拍法测量光速实验的误差影响显著,由于钼酸铅晶体声光品质因数大,对于一定的声功率,较易获得理想的衍射效率,以此为主的声光器件能够使实验误差控制在±0.5以内,且简易,成本低,表明了钼酸铅晶体在近代物理实验中具有潜在的实用价值。
The PbMoO4 crystal is a kind of new type functional material with excellent photoacoustic performance.In this study,it is introduced into measurement of velocity of light with photo-beat method.The basic experiment principle is introduced,the advantages and improvements of the experiment have been also analyzed.The performance of photoacoustic device has significant effects on the measurement error of velocity of light experiment with photo-beat method.Because sound and light quality factor of PbMoO4 crystal is large,for a given sound power,ideal diffraction efficiency can be obtained easily,experimental error can be controlled to within ±0.5,and the photoacoustic device is simple and low cost.It shows that PbMoO4 crystal has potential practical value in modern physics experiments.
出处
《实验科学与技术》
2011年第2期26-27,53,共3页
Experiment Science and Technology
关键词
钼酸铅晶体
光拍法
光速
声光效应
PbMoO4 crystal
photo-beat method
velocity of light
photoacoustic effect
