Rainbow, timelapse - HD 影片檔

Timelapse footage of storm clouds passing, briefly producing a rainbow. A rainbow is an optical phenomenon caused by the refraction and reflection of sunlight within raindrops on the opposite side of the sky to the sun. The sunlight is reflected back to the observer, forming a 42-degree halo centred on the antisolar point (equivalent to the shadow of the observer's head). Filmed in the USA on a spring afternoon.