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.
Combining the rotating vector method,the constructed process of the beat phenomenon and the reason 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 visual and intuitive that one can understand it very easily.
作者
夏峥嵘
李荣青
童悦
徐小雪
XIA Zheng-rong;LI Rong-qing;TONG Yue;XU Xiao-xue(Department of Physics,Huainan Normal University,Huainan,Anhui 232038,China)
出处
《大学物理》
2021年第9期10-12,共3页
College Physics
基金
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。
关键词
“拍”现象
振幅矢量
周期
直观
beat phenomenon
rotating vector
period
intuition
