Likewise, how many types of rainbow are there?
12 types
One may also ask, what is difference between primary and secondary rainbow? A primary rainbow is seen as a result of two refractions and one total internal reflection. A secondary rainbow is seen as a result of two refractions and two total internal reflections. So the difference lies in the number of total internal reflections.
In this way, what is a secondary rainbow?
A secondary rainbow appears outside of a primary rainbow and develops when light entering a raindrop undergoes two internal reflections instead of just one (as is the case with a primary rainbow). This is why the colors of a secondary rainbow change from violet on the top to red on the bottom.
What is the rarest rainbow?
Twinned rainbows
The rarest type of rainbow start from the same base but them split along the arc to form a primary and secondary rainbow. Twinned rainbows are formed when sunlight is refracted after coming into contact with two rain showers which have different size of droplets from each other.
