摘要
双光栅的多普勒频移正比于动光栅的速度,所以测出了多普勒频移就可以定出动光栅的速度.通过对不确定度的分析,得出的结论是:速度测量的相对不确定度等于光栅常数的相对误差.
As the Doppler shift of couple gratings is direct proportional to the velocity of the moving grating, the velocity can be measured by measuring the Doppler shift. Having analysed the uncertainty of velocity , the conclusion is that the relative uncertainty of measured velocity equals the relative error of grating constant.
出处
《大学物理》
北大核心
2008年第1期39-42,共4页
College Physics
关键词
双光栅
多普勒频移
测频
不确定度
couple gratings
Doppler shift
to measure the frequency
uncertainty
