人教版高中物理教材在介绍薄膜干涉时,列举了肥皂液膜的例子。但一些辅导资料在解读肥皂液膜干涉时,出现了一些错误。本文列举三条,予以纠正。一、没有考虑半波损失首先,我们回顾教材是怎么介绍肥皂液膜干涉的。由于重力作用,肥皂液膜上面薄,下面厚。在膜上不同位置来自前后两个面的反射光,即图1中的实线和虚线波形代表的两列光,所走的路程差不同。在某些位置两列波叠加后相互加强,出现亮条纹;在另一些位置叠加后相互削弱,于是出现了暗条纹。注意 People’s PEP version of high school physics teaching materials in the introduction of film interference, the list of examples of soap film. However, some counseling materials in the interpretation of soap film interference, there have been some mistakes. This article lists three, to be corrected. First, did not consider the loss of half-wave First of all, we review the textbook is how to introduce soap film interference. As a result of gravity, soap film thin above, thick below. The reflected light from the front and rear faces at different positions on the film, that is, the two lines of light represented by the solid and dotted waveforms in FIG. 1, have different distances traveled. In some positions, the two waves overlap with each other and appear bright stripe; in other positions, they are weakened after being superimposed, and dark stripes appear. note