题目内容
有a、b两束单色光从空气中平行照射在平行玻璃砖上,它们经玻璃折射后射入空气的光线如图1所示。则有关a、b光的说法正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250047243045058.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250047243045058.png)
A.在玻璃中传播时a光的速度较大 |
B.在同一双缝干涉实验装置发生干涉时a光的干涉条纹间距较大 |
C.从同一介质射向空气时a光发生全反射的临界角较小 |
D.b光在真空中的传播速度较大 |
C
试题分析:根据光路图知,a光的偏折程度大于b光,则a光的折射率大于b光的折射率,根据
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004724319494.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004724351691.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004724366598.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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