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用仪器部门拨来的仪器做光的偏振现象实验,既花时间,又做不成功,即使做成功了,每次只能让一个学生看,演示效果欠佳。我改用幻灯机来演示偏振现象,效果非常好。其优点是:操作简便,省时间(只要1—2分钟),可见度大,全班同学可同时看到,偏振现象极为明显。我是这样做的:1.器材:大小相同的偏振片两块:幻灯机一台;教室天花板为幕布。2.演示:两块偏振片同时并列地置于幻灯机上,分别旋转偏振片,观察现象。然后将偏振片重叠在一起,并旋转上面的那块偏振片,光的偏振现象能清晰地
Using the instruments dialed by the instrument department to do the polarization experiment of light, it takes time and does not succeed. Even if it is successful, only one student can see it at a time, and the demonstration effect is not good. I switched to a slide projector to demonstrate polarization. The effect was very good. Its advantages are: simple operation, saving time (as long as 1-2 minutes), visibility, the whole class can see at the same time, polarization is extremely obvious. I did this: 1. Equipment: Two polarizers of the same size: one slide projector; the classroom ceiling was a curtain. 2. Demonstration: Two polarizers are placed side by side at the same time on a slide projector, and the polarizers are rotated to observe the phenomenon. Then, the polarizers are overlapped and the upper polarizer is rotated. The polarization of the light can be clearly observed.