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Optical Effects
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Primary and secondary bows with precipitation falling in the distance, spotted near Vermontville, Adirondacks, New York, US
A rainbow spotted from above the ground, near Beauvais, France
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A dynamic double rainbow spotted while driving near the Siskiyou Pass, Northern California, US
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A vivid rainbow spotted over Wellington Harbour, New Zealand
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A vivid rainbow accompanied by mammatus (mamma), spotted from the National Center for Atmospheric Research’s (NCAR) Mesa Laboratory, near Boulder, Colorado, US
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A primary and secondary rainbow that includes Alexander's Dark Band, an area that appears dark because the raindrops in that region are refracting sunlight at angles that do not direct any light toward the observer, as seen here over Sittingbourne, Kent, England
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A unique perspective of a rainbow during the evening, wherein the view through the front window gave way to raindrops that looked like 'globules of mercury', spotted near Ormskirk, Lancashire, England
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A primary bow and the beginning of a subtle secondary bow, spotted over Sanxia, New Taipei City, Taiwan
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A primary rainbow with a faint secondary bow, spotted over Newcastle upon Tyne, England
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A primary bow and a subtle secondary bow over Denver, Colorado, US
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Primary and secondary bows spotted over Haarle, The Netherlands
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A primary and secondary bow spotted near Sumirago, Varese, Italy
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A primary and secondary bow spotted by Rafael's friend, Cindy Tang, over Changchun, China
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Rainbow over Schlossborn, Taunus, Germany
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In sharply defined rainbows, a set of narrow coloured bands can often be found repeating on the inside of the primary bow. Called supernumerary bows, they add an extra-special dimension to the display and are produced by diffraction as light waves cross each other exiting the raindrops, as seen here over Amsterdam, Netherlands.
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A primary and secondary rainbow spotted late in the day over Northern California, US
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