Rare circumhorizontal arc seen over Benoni
A local resident, Vincent van Staden, snapped a few pictures of the rare rainbow occurrence in Goedeburg at 12:45.
If you saw what looks like a rainbow on October 25, you were looking at a rare optical phenomenon called a circumhorizontal arc.
A local resident, Vincent van Staden, snapped a few pictures of the rare rainbow occurrence in Goedeburg at 12:45.
When he saw the fire rainbow, he was at Church of the Way, on the corner of Great North and Brentwood Park Road.
He explained that the rainbow is technically called a circumhorizontal arc, fire rainbows are caused by light passing through wispy, high-altitude cirrus clouds. When light enters through a vertical side face of such an ice crystal and leaves from the bottom face, it refracts or bends; in the same way that light passes through a prism.
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