Cinematic 8K 7680×4320 30p. If you desire, you can grab the any 4K or HD crop part you wish. A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. In a double rainbows, a second arc is seen outside the primary arc, and has the order of its colours reversed, with red on the inner side. This is caused by the light being reflected twice on the inside of the droplet before leaving it. Tags: Spray weather air nature cloudy approaching rainy continental barren arid vacant plots blank hill hiily prairie moorland lowland meadow steppe wold storm stormy landscape rainfall curtain of rain waterspout.