Although rainbows are a frequent occurrence in nature, nevertheless, a series of certain events must occur simultaneously so that a seven-color arc forms in the sky. Firstly, there should be a lot of moisture in the air. This is usually possible on a rainy day or after a quick downpour. Secondly, the sun should be relative to the horizon. Scientists have found that if the sun is understood above 42 degrees above the horizon, then you can’t see a rainbow on earth. Thirdly, the part of the sky where the sun is located should be clear and cloudless, while the part of the sky where the rainbow may appear is likely to rain. When all these conditions are met, the sun’s rays are refracted and reflected from water droplets in the sky, creating an optical illusion of what is commonly called a rainbow. Continue reading →