问题
问答题
在图中准确画出所给入射光线经两垂直平面镜反射的反射光线．
答案
光线在两个面上都发生了反射，那么其两次反射的光线和入射光线就是平行的，如图所示：
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在图中准确画出所给入射光线经两垂直平面镜反射的反射光线．
光线在两个面上都发生了反射，那么其两次反射的光线和入射光线就是平行的，如图所示：
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