一、学生的质疑高中物理课本关于通过棱镜的光线的偏折问题,历来采用的都是如图1所示的插图,所以课本对通过棱镜的光线总要向底面偏折这一现象也就自然地解释为:“这是因为光线在棱镜的两个面上发生折射时,两次向底面偏折所造成的”(见甲种本)。这种解释为绝大多数中学生毫无疑义地接受。但个别思想活跃、善于独立思考的学生却会大胆地提出质疑,他们问到:通过棱镜的光线会不会有图2所示的情况发生呢?如果这种情况存在的话,由于在两个侧面折射时一次是向 First, the student’s question High school physics textbooks on the problem of the deflection of light through the prism, has always been used in the illustration shown in Figure 1, so textbooks through the prism of the light will always deflect to the bottom of this phenomenon is also natural The explanation is: “This is because the light is deflected on the two sides of the prism when it is refracted on both sides” (see Type A). This interpretation is undoubtedly accepted by the vast majority of middle school students. However, some students who are active in thinking and good at independent thinking will boldly raise questions. They asked: Will the light passing through the prism appear in the situation shown in Figure 2? If this condition exists, it will be on two sides. When refraction is once