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例1.如图1所示,人的眼睛位于O点,通过平面镜MN观察周围事物,求眼睛可观察到事物的区域.分析和解:本题可利用光路的可逆性求解,将
Example 1. As shown in Figure 1, the human eye is located at point O. Observe the surrounding matter through the plane mirror MN and find the area where the eye can observe things. Analysis and Reconciliation: This problem can be solved by using the reversibility of the optical path.