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| 1. |
What is primary and secondary rainbow ? |
| Answer» Primary Rainbow:The primary rainbow forms between about 40° and 42° from the antisolar point. The light path involves refraction and a single reflection inside the water droplet. If the drops are large, 1 millimeter or more in diameter, red, green, and violet are bright but there is little blue. Such large droplets are suggested by the rainbow at right.Secondary Rainbow :The secondary rainbow is about 10° further out from the antisolar point than the primary bow, is about twice as wide, and has its colors reversed. The light of the secondary bow is one-tenth the intensity of that of the primary bow, given the same viewing conditions.The secondary rainbow involves two reflections inside the falling droplets. | |