像往哪边偏,蜡烛或光屏就向哪边移动
像往哪边偏,透镜就像像相反方向移动
凸透镜成像时,像在光屏上偏上（或偏下） 该怎样移动光屏,凸透镜和蜡烛,使像成在光屏中央?
凸透镜成像时,像在光屏上偏上（或偏下） 该怎样移动光屏,凸透镜和蜡烛,使像成在光屏中央?
物理人气：689 ℃时间：2019-09-30 20:28:29
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