题目内容
如图所示,上下表面平行的玻璃砖折射率为n=
,下表面镶有银反射面,一束单色光与界面的夹角θ=45°射到玻璃表面上,结果在玻璃砖右边竖直光屏上出现相距h=2.0 cm的光点A和B(图中未画出A、B).
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825003704780795.png)
(1)请在图中画出光路示意图.
(2)求玻璃砖的厚度d.
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825003704764352.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825003704780795.png)
(1)请在图中画出光路示意图.
(2)求玻璃砖的厚度d.
(1)
(2)
cm
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/201408250037047952962.jpg)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825003704811346.png)
(1)光路图如图所示.
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/201408250037048272423.png)
(2)设第一次折射时折射角为r.则有:
n=
,
解得:r=30°,
设第二次折射时折射角为α,则有:
=
,解得:α=45°,
由几何关系得:h=2dtan r,
d=
=
=
cm.
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/201408250037048272423.png)
(2)设第一次折射时折射角为r.则有:
n=
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825003704842860.png)
解得:r=30°,
设第二次折射时折射角为α,则有:
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825003704858643.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825003704873355.png)
由几何关系得:h=2dtan r,
d=
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825003704889676.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825003705045725.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825003704811346.png)
![](http://thumb.zyjl.cn/images/loading.gif)
练习册系列答案
相关题目