在现有的几种高级中学物理版本中,在讲到棱镜对光线的折射时,总是这样叙述的,“让一束单色光从空气射向棱镜的一个侧面,可以看到光线从另一个侧面射出,方向发生了明显的变化:光线向棱镜的底面偏折(如图1)”。为此,课本中还作了进一步的分析,“这是因为光线在棱镜的两侧面上发生折射时,两次向底面偏折造成的。” In several existing high school physics editions, when it comes to the prism’s refraction of light, it is always stated that “Let a single beam of light be directed from the air to one side of the prism and you can see the light coming from another. A side shot, the direction has changed significantly: light is deflected toward the bottom of the prism (Figure 1). For this reason, a further analysis was made in the textbook. “This is because the light is deflected twice on the two sides of the prism when it is refracted on both sides of the prism.”