题目内容
一束复色光沿半径方向射向一半圆形玻璃砖,发生折射而分为a、b两束单色光,其传播方向如图所示。下列说法中正确的是
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250029298052689.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250029298052689.jpg)
A.玻璃砖对a、b的折射率关系为na<nb |
B.a、b在玻璃中的传播速度关系为va>vb |
C.单色光a从玻璃到空气的全反射临界角小于单色光b从玻璃到空气的全反射临界角 |
D.用同一双缝干涉装置进行实验可看到a光干涉条纹的间距比b光的宽 |
C
试题分析:光线在半玻璃砖的水平界面发生折射,从玻璃砖到空气,折射率为折射角正弦值与入射角正弦值之比,据图判断,折射率
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002929821504.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002929836483.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002929852470.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002929867727.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002929883529.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002929899652.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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