一物体位于凸透镜前的主光轴上当遮住凸透镜上面一半后物体在光屏上所成的像是 A只有上半部亮度不变 b只有下半部亮度不变 c 与原来 Template




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tomski一物体位于凸透镜前的主光轴上当遮住凸透镜上面一半后物体在光屏上所成的像是 a只有上半部亮度不变 b只有下半部亮度不变 coloring