Weather Things: Haloes

The video explains the phenomenon of Halos, which are less noticeable than rainbows as they occur around the sun or moon. Halos form when light passes through ice crystals in cirrus clouds, refracting into a spectrum of colors. Unlike rainbows, the red color is inside the Halo ring. Various accessories to Halos, such as Parhelia (sun dogs), can appear depending on the type and alignment of ice crystals. Different arcs, like the Sercombe Horizon and tangent arc, are also discussed. At night, Halos are visible around the moon, but their accessories are harder to see.

What is a Halo and how does it differ from a rainbow?

What conditions are necessary for a Halo to occur?

Describe the appearance and characteristics of Parhelia.

What is a Sercombe Horizon and how is it related to Halos?

Explain the phenomenon of the Sercombe Zenith Arc.