Rainbow is a meteorological phenomenon caused by refraction, reflection and dispersion of light in water droplets in the spectrum of light appeared in the sky, the rainbow is caused by light being refracted when entering the water droplets reflect on it. the back of the droplet and refracted again when leaving it. In a double rainbow, a second arc is seen outside the primary arc, and has command of color, contrast and red on the inside curve of the rainbow can be caused by many forms of water in the air. These include not only rain, but also mist, spray and dew in the air for the colors seen by the human eye, they are referred to the most and remember the sequence of Newton Sevenfold red, orange, yellow. , green, blue, indigo and violet.
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