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学生学习几何光学时,对显微镜光路图,感到复杂,难画难记。开展幻灯教学,我应用幻灯片演示显微镜光路图,学生都说明白,好记。具体做法如下。绘制一张幻灯机光路图幻灯片和一张放大镜光路图幻灯片。首先演示幻灯机光路图(图1),再演示放大图1镜光路图(图2)。这两个光路图,简单易记,在此基础图2上,把两片组合(图3),组成显微镜光路图,这一来,学生都记住了,收到了化难为易的效果。
When students are learning geometry optics, they have complex and hard-to-remember pictures of microscope light paths. To carry out the slide show teaching, I applied the slide show microscope light path diagram. The students are all well-informed. The specific approach is as follows. Draw a slide of the projector light path and a slide of the light path of the magnifying glass. First, demonstrate the optical path diagram of the slide projector (Figure 1), and then demonstrate the enlarged Figure 1 optical path diagram (Figure 2). These two light path diagrams are simple and easy to remember. In this basic diagram, two pieces (Fig. 3) are combined to form a microscope light path diagram. In this case, the students have all remembered that they have received the effect that it is difficult to change.