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KentOne
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South Island HD - Desktop Nexus NatureDownload free wallpapers and background images: South Island HD. Desktop Nexus Nature background ID 594119. South Island, New Zealand4.7
Alexander's band or Alexander's dark band is an optical phenomenon associated with rainbows which was named after Alexander of Aphrodisias who first described it. It occurs due to the deviation angles of the primary and secondary rainbows. Both bows exist due to an optical effect called the angle of minimum deviation. Light which is deviated at smaller angles than this can never reach the observer.
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Uploaded By: KentOne
Date Uploaded: January 01, 1970
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Category: Beaches