After rainfall or shower, the tiny droplets of water found in the atmosphere acts as a prism for the rays that are coming from the sun so that the rays that enter the droplets are reflected and dispersed to produce a spectrum of light, which takes on the shape of an arc with seven colours. This is a naturally beautiful phenomenon, called the Rainbow. Thus, it is seen that the rainbow is the result of a combination of reflection, refraction and dispersion of light. The rainbows caused by sunlight are always found to arise opposite the sun in the sky. Even though the rainbow is formed in a full circle in the sky, we only get to view an arc that is created by illuminated droplets.
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