Rainbow

A rainbow spans a continuous spectrum of colours; the distinct bands are an artifact of human . The most commonly cited and remembered sequence, in English, is  sevenfold red, orange, yellow, green, blue, and violet (popularly memorized byRainbows can be caused by other forms of water than rain, including mist, spray.

A rainbow is an and  phenomenon that causes a of  to appear in the sky when the Sun shines on to droplets of moisture in the . It takes the form of a with red on the outer part of the arc and violet on the inner section.