有些时候，阳光经过水滴时可发生两次折射及两次内反射，此时在角半径约为 51 度的位置上便会出现副虹 (Secondary Rainbow)，又称为霓。霓比虹较为少见，而其光度也比正虹为弱。
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secondary rainbow method 二次彩虹法
Rainbow and Secondary Rainbow 虹与霓
Fine structure of secondary rainbow 二次彩虹精细结构
A new experiment setup to be used to obtain the fringe of secondary rainbow of the high refractive glass beads irradiated with laser is presented.
通过对高折射率玻璃微珠在激光照明下形成的二次彩虹的实验研究，提出了一种激光照明下高折射率玻璃微珠二次彩虹条纹图的获取装置。
Man thick solid palm, the empress light and softly and warmly tapping beam secondary rainbow carries on the behind and really coaxs own kid to fallen asleep like a father's sort.
男人厚实的手掌，轻柔地、温暖的轻拍着梁霓的后背，真的如同一个父亲般哄着自己的孩子入睡。
More rarely, a secondary rainbow is seen, which is a second, fainter arc, outside the primary arc, with colours in the opposite order, that is, with violet on the outside and red on the inside.
更罕见，被认为是次要的彩虹，这是第二个，暗弧，外弧的首要，在相反的顺序的颜色，这是紫的，红的外面，里面。
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