Frae Wikipedia
Lowp tae: navigation, rake
Double rainbow an supernumerary rainbows on the inside o the primary arc. The shadow o the photographer's heid on the bottom marks the centre o the rainbow circle (antisolar pynt).

A rainbow is an optical an meteorological phenomenon that is caused bi baith reflection an refraction o licht in watter droplets in the Yird's atmosphere, resultin in a spectrum o licht appearin in the sky. It taks the furm o a multicoloured arc. Rainbows caused bi sunlicht always appear in the section o sky directly opposite the sun.