RAINBOW

Rainbow is a meteorological phenomenon caused by reflection, refraction, and light dispense on water droplets that produce a spectrum of light that appears in the sky. The rainbow forms a circle and is colorful. Like red, orange, yellow, green, indigo and purple. The rainbow caused by sunlight always appears in the sky and faces directly into the sun. The rainbow can be a full circle or only an arc formed by droplets of illuminated water above the ground.

The rainbow is not located at a certain distance, so the rainbow cannot be approached physically. The rainbow can be observed every time there are drops of water in the air and the sun shines from behind. Therefore, rainbows are usually seen in the west sky in the morning and in the eastern sky in the afternoon. Rainbow effects can also be seen near fountains and waterfalls. Rainbow is not in one particular location. There are many rainbows, but only one can be seen depending on a certain angle of view as a droplet of light illuminated by the sun. All raindrops refract and reflect sunlight in the same way, but only light from some raindrops that can be seen by the eye. That light is called the rainbow for those who see.

Rainbow has several variations, including:

Rainbow Double. The term double rainbow is used when primary and secondary rainbows are visible.

Rainbow Twin. Unlike a double rainbow consisting of two separate and concentric rainbows, twin rainbows rarely appear as two rainbow arcs separated from a single base.

Rainbow full circle. In theory, each rainbow is a circle, but from the ground, usually only the top can be seen. Because the center of the rainbow is diametrically opposed to the position of the sun in the sky, more circles appear when the sun approaches the horizon, which means that the largest part of the circle that is usually seen is around 50% at sunset or sunrise.

Rainbow Supernumerary. In certain circumstances, one or more thin and thin bands can be seen limiting the purple edge of the rainbow, that is, in the main arc or, far less frequently, outside the secondary arc. This additional tape is called a supernumerary rainbow or supernumerary ribbon along with the rainbow itself. This phenomenon is also known as a rainbow stacker.

Rainbow Monochrome. Sometimes rain can occur at sunrise or sunset. Where shorter wavelengths such as blue and green have spread and are basically removed from the spectrum. Further spread can occur due to rain, and the results can be either rare or dramatic monochrome or red rainbow.

Source : https://en.wikipedia.org/wiki/Rainbow
Picture : Google