35°-Ring (EE36)

The 35° ring is a faintly colored ring of light with a reddish inner edge and a radius of 35° around the sun. Because of its large refracting angle, it is particularly broad and diffuse. It can also be observed around the moon. It usually occurs together with other halos created by pyramidal crystals, such as the 9° ring. Because it is very weak, it can only be observed very rarely. It is also called Feuillée's halo.

The 35° ring is formed by randomly oriented pyramidal crystals. The light passes through two pyramidal faces at the same end of the crystal that are not adjacent to each other. They enclose an angle of 80.2°. The graphic above shows the light path.