The bending of the light rays is caused by refraction .
光线的弯曲是由折射造成的。
The optical path difference of two rays in the condition of near axis is discussed in the single spherical surface refraction.
本文讨论了单球形折射面在傍轴条件下二相邻光束的光程差问题。
Due to the refraction of light rays, it is impossible for the naked eye to determine the exact location of a star close to the horizon.
由光线光线会发生折射，因此用肉眼无法确定一颗接近地平线的星星的确切位置。
The bending of the light rays is caused by refraction.
光线的弯曲是由折射造成的。
Acting over long sight-lines to the rising and setting Sun or Moon, the refraction significantly alters the path of light rays creating merged, distorted images.
当太阳、月亮东升或西落时，这种效应沿长长视线的方向累积，造成部份光线传播方向出现较大幅度的改变，最后叠出这种扭曲的影像。
Acting over long sight-lines to the rising and setting Sun or Moon, the refraction significantly alters the path of light rays creating merged, distorted images.
当太阳、月亮东升或西落时，这种效应沿长长视线的方向累积，造成部份光线传播方向出现较大幅度的改变，最后叠出这种扭曲的影像。
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