A Rainbow is a multi-colored, arc-shaped phenomenon that can appear in the sky.
The colors of a Rainbow are produced by the reflection and dispersion of light through water droplets present in the atmosphere.
An observer may perceive a Rainbow to be located either near or far away, however, this phenomenon is not actually located at any specific spot.
Instead, the appearance of a Rainbow depends entirely upon the position of the observer in relation to the direction of light. In essence, a Rainbow is an optical illusion.
Rainbows present a spectrum made up of seven colors in a specific order.
In fact, school children in many English-speaking countries are taught to remember the name “Roy G. Biv” as a mnemonic device for remembering the colors of a Rainbow
and their order. “Roy G. Biv” stands for: red, orange, yellow, green, blue, indigo, and violet.
The outer edge of the rainbow arc is red, while the inner edge is violet.
Rain is the primary source of most of the fresh water in the world.
It plays an important role for life on Earth as part of the hydrologic cycle.
When the moisture from the oceans evaporates into the sky, condenses into droplets,
and precipitates from the sky over the Earth’s surface, water is distributed throughout the globe.