Rainbow - atmospheric optical and meteorological phenomenon that is observed when illuminated by the sun (and sometimes the Moon) of a set of water drops (rain or fog). Rainbow looks like a multicolored arc or circle, composed of the colors of the spectrum (from the outer edge of the red, orange, yellow, green, blue, indigo, violet). According to ancient legends, where a rainbow hits the ground hidden treasures buried gnomes. Our rainbow hits the ground, but we did not find the treasure ...