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