摘要
波从波疏介质垂直入射到波密介质并从界面处反射回波疏介质时,界面处形成波节,合成波位移为零,此时反射波与入射波是不连续的,反射波和入射波相比,发生了π相位突变.因π相位突变对应的是半个波长的变化,故称作半波损失.本文借助于参考圆和旋转矢量,详尽分析了入射波和反射波在节点处的形态和变化,阐明了π相位突变的形成过程和机理,从而将半波损失这一抽象的概念形象地展示在读者面前.
When the wave is perpendicular to the dense medium from the sparse medium and reflects the echo-hydrophobic medium from the interface,the Wave section is formed at the interface,and the synthetic wave displacement is zero,when the reflected wave and the incident wave are discontinuous,and the reflected wave and the waves occur(phase mutation).Because(the phase mutation corresponds to a half-wavelength change,it is called a half-wave loss.)Based on the reference circle and rotation vector,The morphology and change of the incident wave and reflected waves at the node are analyzed in detail,and the formation process and mechanism of the phase mutation are Expounded.thus,the abstract concept of half-wave loss is visualized in front of the Reader.
作者
左武魁
周惟公
魏民云
张逢春
Zuo Wukui;Zhou Weigong;Wei Minyun;Zhang Fengchun(China University of Geosciences Great Wall College,Baoding,Hebei 07100)
出处
《物理通报》
2019年第1期33-35,共3页
Physics Bulletin
关键词
旋转矢量
半波损失
机理分析
rotational vector
half-wave loss
analysis of mechanism
