Sun and Rain!
Two things needed to make a rainbow are sunlight and water droplets in the air. As sunlight passes through the water droplets, it is refracted and dispersed into its different colors, creating the visible spectrum of a rainbow.
It is when there are two rainbows on a place rather than so above one rainbow is another therefore double rainbow
When two rainbows appear next to each other, it is known as a double rainbow. The secondary rainbow is fainter and has its colors reversed because the light is reflected twice inside the raindrops, creating a mirror image of the primary rainbow.
A double rainbow is not unusual but is often too faint to be noticed. A rainbow is caused by sunlight refracting and reflecting in water droplets. If the light is reflected twice in the droplets, there will be a second rainbow outside the first. It will be fainter and the order of the colors will be reversed. Whenever you see a rainbow, look carefully to see if there is a second one right above it.
There are conditions that permit viewing two rainbows at once. The primary rainbow is as one might expect, but a secondary rainbow is visible above the first one. There is a nice picture and a description posted at Wikipedia, and a link is included.
Two things needed to make a rainbow are sunlight and water droplets in the air. As sunlight passes through the water droplets, it is refracted and dispersed into its different colors, creating the visible spectrum of a rainbow.
Plants and Animals!
For a rainbow to form, two things have to be present: sunlight and water droplets in the air. The sunlight is refracted and reflected within the water droplets, causing the colors of the spectrum to be visible as a rainbow.
the fog badge and the rainbow wing
Glucose and oxygen
Two eggs and Two Sperm.
The light bends and it is separated in the different colors of the rainbow.
They needed a keep because that was the strongest part of the castle and the portculis.
Land & Trade
soil and sunlight
Rainbow has two syllables.
Heat and pressure