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题目:如图,由发光点 S 发出的哪条光线经平面镜反射后,反射光线将通过 A 点?画出这条光线的光路图.
Title: As shown in the figure, which light rays emitted by the light emitting point S are reflected by the plane mirror, the reflected light will pass through the point A to draw the light path diagram of this light.