A rainbow is an optical and meteorological phenomenon that is caused by reflection of light in water droplets in the Earth’s atmosphere, resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured arc.
Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.
This immense, curved spectrum of light appears only when both the elements of sunshine and rainfall present. As the sunlight enters the falling raindrops, it breaks up into its true colors of red, orange, yellow, blue, and violet. These colors are always arranged according to their wavelengths, with red being at one end of the spectrum, and violet at the other. Once inside the droplet, the particles of colored light bounce from side to side, reflect off of the far side of the droplet, exit the droplet, and reassemble, according to their wavelengths, to form a rainbow.
Rainbow will be seen after rainnig. I like the rainbow because it was colourful. It consists of seven colours(red, orange, yellow, green, blue, violet, and purple )