通过本章的学习,对毛泽东思想概论课程有基本的了解,懂得毛泽东思想是中国革命胜利的光辉旗帜,掌握毛泽东思想的主要内容,为以后各章的学习打好基础

光线轨迹:限制在子午平面内传播的周期曲线。轨迹曲线在 光纤端面投影线仍是过园心的直线,但一般不与纤壁相交。 广义折射定律:m(r)cos0(r)=K常数) 局部数值孔径:定义局部数值孔径NA(r)为入射点媒质折射率 与该点最大入射角的正弦值之积,即

What is FBG? An in-fibre Bragg grating is constructed by varying the refractive index of the core lengthwise along the fibre. Light of the specified wavelength traveling along the fibre is reflected from the grating back in the direction from which it came. Wavelengths which are not selected are passed through with little or no attenuation

经典力学在伽利略变换下形式不变(具有伽利略 协变性),一般仅适用于v<