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光的二次折射现象一般是指光从A介质斜射入B介质后又从B介质中射出的现象(即光通过了两个界面).要正确认识光的二次折射现象,同学们首先要理解掌握以下两个问题.1.光的折射原理和偏折规则光只有斜射到界面时方向才会发生偏折,垂直入射时进入另一种介质光线方向不变.偏折规律:从真空(空气)进入其他介质光线向法线靠拢,反之远离法线.
The phenomenon of the second refraction of light generally refers to the phenomenon that the light emerges from the A medium obliquely into the B medium and then emerges from the B medium (that is, the light passes through two interfaces) .To correctly understand the secondary refraction of light, students first Understand and master the following two questions: 1. The principles of light refraction and deflection rules Light only oblique to the interface when the deflection occurs, the normal incidence into another medium light direction unchanged deflection law: from the vacuum ( Air) into other medium light to move closer to the normal, and vice versa away from the normal.