学习了光学知识后爱动�筋的小李和小�想自己探究小孔成像现象.如图1所示他们给两个空罐的底部中央分别打上一个圆孔和一个方孔再用两片半透明的 Template




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tomski学习了光学知识后爱动�筋的小李和小�想自己探究小孔成像现象.如图1所示他们给两个空罐的底部中央分别打上一个圆孔和一个方孔再用两片半透明的 coloring