Every time light moves into a material with a new speed, it bends and scatters.
每次光线以新的速度穿越一个物体时，它会弯曲，并发生散射。
2
And on top of that, when that visible radiation bounces off those molecules, it scatters in all directions.
除此以外，当可见光波从这些分子上反射出去时，它会向四面八方扩散。
3
Near cities, the air scatters the glare from lights, producing an illumination that hides the faintest stars and limits the distances that can be probed by telescopes.