A Rainbow is a multicoloured arc made due to the striking of light on water droplets. It is an optical illusion which means that it doesn't exist in a specific spot in the sky. It depends on where you are standing and the position of the sun or other sources of light.
A rainbow is formed when light (generally sunlight) passes through water droplets hanging in the atmosphere. The light waves change direction as they pass through the water droplets, resulting in two processes: reflection and refraction. A rainbow is a natural spectrum of sunlight in the form of bows appearing in the sky when the sun shines on rain drops. It is combined result of reflection, refraction and dispersion of sunlight from water droplets, in atmosphere. Always it formed in the direction opposite to the sun. Rainbow Formation. Dispersion of Light by Prisms. Rainbow Formation. Mirages. One of nature's most splendid masterpieces is the rainbow. A rainbow is an excellent demonstration of the dispersion of light and one more piece of evidence that visible light is composed of a spectrum of wavelengths, each associated with a distinct color. OeXt7YH.