精选初中八年级下册物理四眼睛和眼镜北师大版练习题含答案解析第二十三篇.docx

精选初中八年级下册物理四眼睛和眼镜北师大版练习题含答案解析第二十三篇.docx

《精选初中八年级下册物理四眼睛和眼镜北师大版练习题含答案解析第二十三篇.docx》由会员分享，可在线阅读，更多相关《精选初中八年级下册物理四眼睛和眼镜北师大版练习题含答案解析第二十三篇.docx（40页珍藏版）》请在冰点文库上搜索。

精选初中八年级下册物理四眼睛和眼镜北师大版练习题含答案解析第二十三篇

2019年精选初中八年级下册物理四、眼睛和眼镜北师大版练习题-含答案解析第二十三篇

第1题【单选题】

光的世界丰富多彩，光学器件在我们的生活、学习中有着广泛应用．下列说法中符合实际的是（）

A、近视眼镜利用了凸透镜对光线的发散作用

B、照相时，被照者应站在距镜头二倍焦距以外

C、借助放大镜看地图时，地图到放大镜的距离应大于一倍焦距

D、阳光通过凸透镜可以点燃纸屑，是利用凸透镜对光线的放大作用

【答案】：

【解析】：

第2题【单选题】

常见的视力缺陷有近视和远视两种，如图是表示甲乙两人看物体时的光路图，要在视网膜上成清晰的像，则下列说法正确的是（）

A、甲是近视眼，需配戴的眼镜是凸透镜

B、乙是近视眼，需配戴的眼镜是凹透镜

C、甲是远视眼，需配戴的眼镜是凹透镜

D、乙是远视眼，需配戴的眼镜是凸透镜

【答案】：

【解析】：

第3题【单选题】

如图是某同学佩戴隐形眼镜用来矫正近视眼．隐形眼镜的形状应为（）

A、

B、

C、

D、

【答案】：

【解析】：

第4题【单选题】

如图所示，表示近视眼成像原因及其矫正方法的示意图是（）

A、甲和丙

B、甲和丁

C、乙和丙

D、乙和丁

【答案】：

【解析】：

第5题【单选题】

关于近视镜片和远视镜片，下列说法中正确的是（）

A、都是凸透镜

B、近视镜片是凹透镜，远视镜片是凸透镜

C、都是凹透镜

D、近视镜片是凸透镜，远视镜片是凹透镜

【答案】：

【解析】：

第6题【单选题】

关于视角，下列说法不正确的是（）

A、眼睛视网膜上像的大小取决于物体对眼的光心所张的角，即从物体两端向眼的光心所引的两条线所夹的角，这就是视角

B、我们看到物体的大小决定于视角大小

C、同一物体离眼睛越近所引起的视角就越大

D、视角就是眼睛看到的角

【答案】：

【解析】：

第7题【单选题】

如图是眼睛的成像光路，下列说法正确的是（）

A、甲是近视眼，应戴凸透镜眼镜；乙是远视眼，应戴凹透镜眼镜

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