题目内容
如图所示,紫光从均匀物质a通过其他三层均匀物质b、c、d传播,每层的表面彼此平行,最后紫光又进入另一层均匀物质a。在各个表面的折射都画在图中(未画出相应的反射),则:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250011379122835.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250011379122835.jpg)
A.b物质的折射率大于d物质的折射率 |
B.c物质的折射率最小 |
C.另一层物质a的出射光线一定与物质a中的入射光线平行 |
D.若改为红光,仍按原光线方向入射,红光有可能在物质d和另一层物质a的交界处发生全反射 |
BC
试题分析:由光的折射定律知
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250011379581458.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001137974469.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001137990504.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001138005305.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001138036339.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001138052447.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001138068609.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250011380834292.jpg)
![](http://thumb2018.1010pic.com/images/loading.gif)
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