大学物理 ›› 2018, Vol. 37 ›› Issue (4): 8-10.doi: 10.16854 /j.cnki.1000-0712.170048

• 教学讨论 • 上一篇    下一篇

机械波在界面的反射、透射和半波损失

丁桂军   

  1. 中国科学技术大学物理学院,安徽合肥230026
  • 收稿日期:2017-02-02 修回日期:2017-07-13 出版日期:2018-04-21 发布日期:2018-04-21
  • 作者简介:丁桂军( 1980—) ,男,安徽合肥人,中国科学技术大学近代物理系教授,博导,主要从事基本粒子物理
  • 基金资助:
    国家自然科学基金委优秀青年基金项目( 11522546) 资助

Derivation of reflection wave,transmission wave and half wave loss of mechanical waves

DING Gui-jun   

  1. School of Physical Sciences,University of Science and Technology of China,Hefei,Anhui 230026,China
  • Received:2017-02-02 Revised:2017-07-13 Online:2018-04-21 Published:2018-04-21

摘要: 本文推导出了平面简谐波垂直入射时在界面上产生的反射波和透射波的表达式,并讨论波从波疏介质传播到波密介质产生的半波损失现象.有助于理工科学生理解机械波界面行为等相关物理概念和物理规律.

关键词: 反射波, 透射波, 半波损失, 机械波界面行为

Abstract: We have derived the expressions of reflection wave and transmission wave when a mechanical wave reaches perpendicularly an interface of two media. It is shown that half wave loss appears when a mechanical wave propagates from sparse medium to dense medium. Our analyses are helpful to understand the key concepts and physical laws of the interfacial behavior of mechanical waves.

Key words: reflection wave, transmission wave, half wave loss, mechanical wave interface behavior