The photographer Contact info View guestbook Sign guestbook Guest photo gallery Links Home . Infralateral arcs Infralateral arcs are two arcs to the lower left and lower right of the sun, at a minimal distance of 46 degrees, and curved outward. They are produced by light being refracted through pencil-shaped, horizontally aligned, ice crystals.
Light enters one of the vertical end faces and exits a side face.
The freedom of rotation along the crystal's horizontal axis yields an arc instead of a parhelion. All photos and video files on this site are copyright H.E. Edens, unless explicitly noted otherwise.