摩根勒菲
The low-lying damp ground can produce a visual effect known as a Fata Morgana. This optical phenomenon occurs because rays of light are strongly bent when they pass through air layers of different temperatures in a steep thermal inversion where an atmospheric duct has formed. The Italian name "Fata Morgana" is derived from the name of Morgan le Fay, who was alternatively known as Morgane, Morgain, Morgana and other variants. Morgan le Fay was described as a powerful sorceress and antagonist of King Arthur and Queen Guinevere in the Arthurian legend.