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在光学作图中,一些同学对“根据入射光线(或折射光线)方向完成光路”和“根据入射光线与折射光线方向在弯折处填上适当的透镜”一些题,作图不正确,主要原因是由于凸透镜对光线的“会聚”作用和凹透镜对光线的“发散”作用不理解,从而造成判断错误.下面就“会聚”和“发散”浅谈其意义. 一怎样判断“会聚”和“发散”一些学生把两条光线“相交”理解为“会聚”,把
In the optical drawing, some students have incorrectly plotted the “complete the light path according to the direction of the incident light (or refracted light)” and “put the appropriate lens at the bend according to the direction of the incident light and the refracted light”. The reason is that due to the “convergence” effect of the convex lens on the light and the “divergence” effect of the concave lens on the light, a judgment error is caused. The meanings of “convergence” and “divergence” are discussed below. How to judge “convergence” and “convergence” Divergence “Some students understand the intersection of two rays as ”convergence,"