Rare Rainbow Cloud in Bangalore

03 Rainbow Cloud - Solitary Beauty

Seen on November 18 2006 around 5:30PM on the western horizon as the sun was setting. This is quite a rare event, though many people have reported seeing this kind of a cloud at many different occasions.

Reason for a rainbow being visible in a cloud has been given as oblique rays of the sun (58 degrees is the optimal angle) hitting a high altitude (cirrus) cloud which is mainly composed of ice crystals in such a way that the light bends through the cloud and refracts, giving rise to the rainbow phenomenon within it.

A simple Google search will yield many such recorded evidences, some more beautiful than this one. But, this is my first sighting of a rainbow cloud.

More pics.

02 Sunset and Rainbow Cloud
View of the Sun setting and the Rainbow cloud to its left. (our right side)

04 Rainbow Cloud - High Contrast
A digital zoom closeup of the rainbow cloud. I wish I had telescopic lens! :-(

06 Rainbow Cloud - Disappearing
The rainbow cloud fading away…

2 Comments so far

  1. Dr Vivek M (unregistered) on November 24th, 2006 @ 11:08 pm

    Wow! I had never heard of a rainbow cloud before! Thanks for sharing with us…

  2. rubic_cube (unregistered) on November 25th, 2006 @ 10:27 am

    Even I never heard about it until I read this article. But that evening was a pleasant surprise.

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