小明同学在探究凸透镜成像成像规律时，用焦距分别为f1、f2的甲、乙两个凸透镜进行实验．先将点燃的蜡烛、透镜甲和光屏放置在光具坐上，调整后的位置如图所示，此时在光屏上得到烛焰清晰的像（图中未标出）：再用_刷题宝

题干

小明同学在探究凸透镜成像成像规律时，用焦距分别为f₁、f₂的甲、乙两个凸透镜进行实验．先将点燃的蜡烛、透镜甲和光屏放置在光具坐上，调整后的位置如图所示，此时在光屏上得到烛焰清晰的像（图中未标出）：再用透镜乙替换透镜甲，且保持蜡烛和透镜的位置不变，将光屏向左移动再次得到烛焰清晰的像．下列判断正确的是（）

A：图中光屏上的像是放大的

B：图中光屏上的像是缩小的

C：f₁＜f₂

D：f₁＞f₂

上一题下一题 0.0难度选择题更新时间:2018-08-30 09:38:24

答案(点此获取答案解析）

B,D

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