反云隙光
反云隙光（Anticrepuscular rays）：一种常见于日落与日出时分的大气现象。太阳于低角度时，阳光穿过云层隙缝，形成云隙光；若有两道云隙光的夹角较小，对地面观测者来说，就好像是两条光芒从日落的西天射出，辐合于天顶对面的东边。此现象即为反云隙光。
注意：反云隙光容易跟反曙暮光混淆；其实两者是差别颇大的现象。
Anticrepuscular rays
中文百科
英语百科
Anticrepuscular rays 反云隙光
Anticrepuscular rays or antisolar rays are similar to crepuscular rays, but seen opposite the sun in the sky. Anticrepuscular rays are near-parallel, but appear to converge at the antisolar point because of linear perspective. Anticrepuscular rays are most frequently visible near sunrise or sunset. Crepuscular rays are usually much brighter than anticrepuscular rays. This is because for crepuscular rays, seen on the same side of the sky as the sun, the atmospheric light scattering and making them visible is taking place at small angles (see Mie theory).
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