光的波動性是物理光学中的一個重點內容,伹由于光波不像机械振動中所發生的波那样容易觀察,因此成為教學中感覺困難的課题。要想使这一課题的內容容易地為學生接受,固然有赖於教師在理論上的系统講解,但主要關键还在於用实际的演示實驗和對自然现象觀察的实例,來證明光的波動性。波的干涉和衍射是波動的重要表征,因此光的干涉和衍射现象的演示和观察也就成為光的波動性這一課題的教学的重要环節。 The fluctuation of light is one of the key points in physical optics. Since light waves are not as easily observed as waves that occur in mechanical vibrations, they become subjects that are difficult to feel in teaching. To make it easy for students to accept the content of this subject depends, of course, on teachers’ systematic explanations in theory. However, the key point lies in using actual demonstration experiments and observation of natural phenomena to prove the fluctuation of light Sex. Wave interference and diffraction are important characteristics of fluctuations. Therefore, the demonstration and observation of light interference and diffraction phenomena become an important part of the teaching of light fluctuation.