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springely said:
A arco iris, arco-íris is an optical and meteorological phenomenon that causes a spectrum of light to appear in the sky when the Sun shines onto droplets of moisture in the Earth's atmosphere. They take the form of a multicoloured arc, with red on the outer part of the arc and tolet, violet on the inner section of the arc. A arco iris, arco-íris spans a continuous spectrum of colours; the distinct bands are an artifact of human colour vision. The most commonly cited and remembered sequence, in English, is Newton's sevenfold red, orange, yellow, green, blue, indigo and tolet, violet (popularly memorized por mnemonics like Roy G. Biv). Rainbows can be caused por other forms of water than rain, including mist, spray, and dew.
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