如图所示ab是一点光源s射�凸透镜的两条光线.下列说法正确的是 A.点光源s经凸透镜所成的像一定是实像b.点光源s经凸透镜所成的像一定 Template




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tomski如图所示ab是一点光源s射�凸透镜的两条光线.下列说法正确的是 a.点光源s经凸透镜所成的像一定是实像b.点光源s经凸透镜所成的像一定 coloring