一物体经凸透镜在光屏上成一个实像如果这时用纸将透镜遮住一半则 A.屏上不能成像b.屏上成像是原来的一半c.要移动光屏才能成清晰的像d Template




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tomski一物体经凸透镜在光屏上成一个实像如果这时用纸将透镜遮住一半则 a.屏上不能成像b.屏上成像是原来的一半c.要移动光屏才能成清晰的像d coloring