题目内容
某同学用如图所示的方法测量水的折射率:在一个圆柱形容器中紧贴着器壁竖直插入一根直尺,眼睛在容器外的P处斜向下观察。容器中没有水时恰好可以看到A处。装满水时,在观察位置不变的情况下,恰好可以看到B处。他分别测出了A、B两点距水面的距离
、
以及容器的直径d。由此求出水的折射率为
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242325061158608.png)
A.
B.
C.
D. ![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824232510499826.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824232504508385.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824232505210379.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242325061158608.png)
A.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824232506848473.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824232507706470.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824232509095830.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824232510499826.png)
D
试题分析:没有水时,光沿直线传播,如图所示做法线MN,入射点O,入射角为
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824232511887535.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824232513338527.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242325146641183.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824232515725507.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242325166921188.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242325180341659.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目