大学物理 ›› 2021, Vol. 40 ›› Issue (9): 10-.doi: 10.16854 / j.cnki.1000- 0712.200324

• 教学讨论 • 上一篇    下一篇

关于“拍”现象的直观教学

夏峥嵘,李荣青,童 悦, 徐小雪   

  1. 淮南师范学院物理系安徽淮南 232038
  • 收稿日期:2020-07-21 修回日期:2020-12-08 出版日期:2021-09-20 发布日期:2021-09-24
  • 通讯作者: 李荣青,E-mail:47152324@ qq.com
  • 作者简介:夏峥嵘(1980—),女,汉族,江苏灌云人,淮南师范学院物理系副教授,硕士,主要从事材料及物理学相关教学研究工作.
  • 基金资助:
    安徽省重大教学研究项目(2018jyxm1331,2020xsxxkc413);淮南师范学院质量工程项目(2019syjx15,2017 hsjyxm24,2019hsjy78)资助

The intuitional teaching method of the beat phenomenon

XIA Zheng-rong, LI Rong-qing, TONG Yue,XU Xiao-xue   

  1. Department of Physics,Huainan Normal University,Huainan,Anhui 232038,China
  • Received:2020-07-21 Revised:2020-12-08 Online:2021-09-20 Published:2021-09-24

摘要: 采用旋转矢量法分析了“拍”现象的形成过程,解释了“拍”现象中振幅和相位变化特征的原因和变化规律,借助图形说明了周期和频率等特征量的物理内涵,呈现了振幅的相位突变情况,使得“拍”现象中变化规律的本质原因直观具体地呈现,这种分析方法能有效地加深学习者对“拍”现象的本质理解,有效提高课堂教学效果.

关键词: “拍”现象, 振幅矢量, 周期, 直观

Abstract: Combining the rotating vector method, the constructed process of the beat phenomenon and

the rea- son that caused the characteristic of the Beat phenomenon are analyzed. Then the

amplitude and the phase position of the beat phenomenon are discussed in detail. Finally, the

phase jump is also shown by the rotating vector method

clearly. The method describing the beat phenomenon in this paper makes the model of the beat

phenomenon so visu-al and intuitive that one can understand it very easily.

Key words: beat phenomenon, rotating vector, period, intuition