| 1. | Why is the region outside the primary rainbow much darker than that inside the primary rainbow
为什么主虹之外面总是较里面暗？ |
| 2. | The diagram above also explains why the colour sequence is reversed when compared with a primary rainbow
上图亦说明了为什么霓的颜色排列次序跟主虹是相反的。 |
| 3. | The diagram above also explains why the colour sequence is reversed when compared with a primary rainbow
上图亦说明了为什么霓的颜色排列次序跟主虹是相反的。 |
| 4. | The rainbow which we normally see i . e . primary rainbow results from one reflection inside a droplet
在水滴内经过一次反射的光线，便形成我们常见的彩虹主虹。 |
| 5. | The rainbow which we normally see ( i . e . primary rainbow ) results from one reflection inside a droplet
在水滴内经过一次反射的光线，便形成我们常见的彩虹（主虹） 。 |
| 6. | 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。 |
| 7. | 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。 |
| 8. | In the photo above , do you notice that the region outside the primary rainbow looks much darker than that inside the primary rainbow
在上面的照片中，你有否留意到主虹外侧的区域较主虹内侧为暗？ |
| 9. | In the photo above , do you notice that the region outside the primary rainbow looks much darker than that inside the primary rainbow
在上面的照片中，你有否留意到主虹外侧的区域较主虹内侧为暗？ |
| 10. | 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。 |
