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  1. Cloud iridescence - Wikipedia

    • Cloud iridescence or irisation is a colorful optical phenomenon that occurs in a cloud and appears in the general proximity of the Sun or Moon. The colors resemble those seen in soap bubbles and oil on a water surface. It is a type of photometeor. This fairly common phenomenon is most often observed in altocumulus, cirrocumulus, lenticular, and cirrus … See more

    Etymology

    Irisations are named after the Greek goddess Iris, goddess of rainbows and messenger of Zeus and Hera to the mortals bel… See more

    Mechanism

    Iridescent clouds are a diffraction phenomenon caused by small water droplets or small ice crystals individually scattering light. Larger ice crystals do not produce iridescence, but can cause halos, a different ph… See more

     
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