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Rainbows are a meteorological phenomenon that consists of a multicolored circular arc appearing in the sky. They are caused by reflection, refraction, and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.Rainbows appear when sunlight interacts with raindrops suspended in the air. The sunlight is refracted (bent) as it enters the water droplet, then internally reflected off the inside surface of the droplet, and finally refracted again as it exits the droplet. This causes the different colors of light to separate and form a circular arc.The primary rainbow consists of seven colors: red, orange, yellow, green, blue, indigo, and violet (ROYGBIV). Red is on the outer edge of the rainbow and violet on the inner edge. The exact appearance and intensity of colors may vary depending on atmospheric conditions.Secondary rainbows can also occur if there is a double reflection inside the water droplets. In this case, the order of colors is reversed compared to the primary rainbow.Rainbows are often associated with positive symbolism such as beauty, hope, luck, and happiness. They have been featured prominently in folklore, myths, literature, art, and cultural representations throughout history.While rainbows are typically seen after rainfall when there are water droplets in the air to refract sunlight, they can also be observed from other sources such as fountains or even ocean waves under appropriate lighting conditions.

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