Arising from two internal reflections , the secondary bow appears less bright and has the colour sequence reversed 副虹是光线经两重内部反射而产生的，颜色较主虹淡，排列次序与主虹呈相反。
2.
Arising from two internal reflections , the secondary bow appears less bright and has the colour sequence reversed 副虹是光线经两重内部反射而产生的，颜色较主虹淡，排列次序与主虹呈相反。
3.
Rainbows sometimes appear as two concentric bows with the inner one called the primary bow and the outer one the secondary bow 彩虹有时会以两条同心圆弧形态出现。内弧称为主虹，外弧称为副虹或霓。
4.
Rainbows sometimes appear as two concentric bows with the inner one called the primary bow and the outer one the secondary bow 彩虹有时会以两条同心圆弧形态出现。内弧称为主虹，外弧称为副虹或霓。
