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夫琅禾费单缝衍射单缝衍射

于 2022-03-04 发布 文件大小:4.19 kB
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夫琅禾费单缝衍射是大学物理波动光学及大学物理基础实验的重要教学内容[1,2 ]。在理论教学中, 通常是先通过菲涅尔半波带法推得亮纹中心( 或暗纹中心) 的公式,再讨论条纹随波长、缝宽和透镜到屏 幕的距离等参数的变化。由于对公式讨论比较抽象,教学效果不够理想。在实验中,如将观察条纹随波 长、缝宽和透镜到屏幕的距离这些参数的变化作为实验内容,由于使用的光学实验仪器比较精密,调节起 来比较复杂、耗费时间。学生在仪器调节方面花费太多的时间,往往不能更好地理解实验原理和观察实验 现象,所以通常只是把用光电探头测定激光单色光源的单缝衍射光强分布作为实验内容,没有涉及观察条 纹随波长、缝宽和透镜到屏幕的距离这些参数的变化。 对于以上问题,本文应用MATLAB GUI 技术开发了夫琅禾费单缝衍射仿真软件。该仿真软件可以对 单缝衍射在各种不同参数条件下进行模拟,界面中采用交互式滚动条动态的展现各参数与衍射条纹之间 的关系,结果直观、逼真,有利于加深学生对原理的理解和认识,便于单缝衍射的学习和研究

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