光的衍射现象对高中学生来说是比较有吸引力的,其原因是因为它不仅是现象别致,色彩鲜艳,而且具有实用价值,所以即使目前高中物理中已删去了衍射光栅的内容,但作为教师(也包括学生)掌握一些光栅的自制方法,仍然是有好处的。一、用薄纱布制作:为便于使用、保存,可剪一片厚纸片(可用旧挂历),中间挖一个约手指甲大小的孔,在孔上贴上一片薄纱布后再盖上同样的一片有孔的厚纸片。这样便做成了一片“自制光栅”。若要增加衍射条纹可在纸孔中贴二片或三片以上的薄纱巾(要适当调整粘贴的方向)。观察方法:适宜于观察电灯,距离应稍 The phenomenon of light diffraction is more attractive to high school students. The reason is that because it is not only a unique phenomenon, it is colorful, and it has practical value, even though the content of diffraction gratings has been deleted in high school physics, As teachers (including students) master some raster home-made methods, it is still beneficial. First, the use of gauze fabric: For ease of use, save, you can cut a thick piece of paper (used old calendar), in the middle of a hole about the size of a fingernail, paste a thin gauze in the hole and then cover the same piece Thick paper with holes. This made a “self-made grating.” To increase the diffraction fringe, two or more thin gauze can be placed in the paper hole (adjust the orientation of the paste). Observation method: suitable for observation of lights, the distance should be slightly