Photo in the News: Rare &Rainbow& Spotted Over Idaho

Prismatic ice rainbow, a rare phenomenon!
It asks for three conditions: high-altitude cirrus clouds, a sun at more than 58 above the horizon, and a parallel orientation of earth and the surfaces of ice particles in the cirrus.
( …more in the National Geographic article)

‘Diatom Rainbows’, a photomicrography by Michael Stringer; the rainbow-like effect is due to polarizing light-filters.
So very elegant!

About louvain95

A lover of visual arts.
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