如图所示某小组在研究凸透镜成像的实验中让一束平行光经过凸透镜在光屏上得到一个最小最亮的光�由此可以判断凸透镜的焦距是 cm若要在光屏上 Template




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tomski如图所示某小组在研究凸透镜成像的实验中让一束平行光经过凸透镜在光屏上得到一个最小最亮的光�由此可以判断凸透镜的焦距是 cm若要在光屏上 coloring