We study the beam paths in uniaxial crystal with arbitarily oriented optical axis in general conditions, by it′splane and ellipsoid of refraction index and Fresnel law.
从菲涅耳定律出发，利用单轴晶的折射率面和光率体，讨论了在一般情况下单轴晶内部的光路问题。
2
Now, you could ask yourself the question: What is the velocity of that plane when it is at that point s?
现在，你们可以问自己一个问题：，飞机在飞到s点的时候，速度是多少？
3
S, have the capacity for autonomous flight and navigation.A radio-controlled plane becomes an autonomous drone when it is given an autopilot, which Mr.Anderson calls "giving the plane a brain."