Location: Sunnyvale, CA Time Sunday Apr 27th 2008. 1230pm
So I was out running on saturday and I was this great looking yet rare part of a rainbow in the sky. I guess there must be some refraction theory behind it…I wished I had a better camera to use as a wall paper but since I was out running, my Ipaq 6828 will have to suffice
A closer look at the streak of cloud
Doing a search for “Rainbow in the clouds” led me to this National Geographic article which unsuprisingly had a much better picture than mine
a href=”http://zhouwenhan.com/wp-content/uploads/2008/04/060619-rainbow-fire_big.jpg”> http://news.nationalgeographic.com/news/2006/06/060619-rainbow-fire.html June 19, 2006—It looks like a rainbow that’s been set on fire, but this phenomenon is as cold as ice. Known in the weather world as a circumhorizontal arc, this rare sight was caught on film on June 3 as it hung over northern Idaho near the Washington State border (map of Idaho). The arc isn’t a rainbow in the traditional sense—it is caused by light passing through wispy, high-altitude cirrus clouds. The sight occurs only when the sun is very high in the sky (more than 58° above the horizon). What’s more, the hexagonal ice crystals that make up cirrus clouds must be shaped like thick plates with their faces parallel to the ground. 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. If a cirrus’s crystals are aligned just right, the whole cloud lights up in a spectrum of colors. This particular arc spanned several hundred square miles of sky and lasted for about an hour, according to the London Daily Mail.
A Youtube Video of a rainbow in the cloud. Taken in Singapore! My hometown! what a coincidence