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干涉和衍射是一切波特有的现象,要证明光具有波动性,就必须做好双缝干涉和单缝衍射演示实验。按照课本上的实验方法演示,不仅操作麻烦,而且可见度和可见范围都较小,不能让全班学生都看见。为了减小实验操作的难度,提高演示的可见度和可见范围,让全班学生都能明显地看见现象,笔者对这两个演示实验做了以下改进。
Interference and diffraction are all Potter’s phenomena. To prove that the light is fluctuating, it is necessary to do double-slit interference and single-slot diffraction demonstration experiments. According to the experimental method in the textbook, not only the operation is troublesome, but also the visibility and the visible range are small, which cannot be seen by the whole class of students. In order to reduce the difficulty of the experimental operation and improve the visibility and visibility of the presentation, the entire class can clearly see the phenomenon. The author has made the following improvements to these two demonstration experiments.