Rainbow
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A rainbow is an optical phenomenon caused by refraction, internal reflection and dispersion of light in water droplets resulting in a continuous spectrum of light appearing in the sky. The rainbow tak
Double rainbow and supernumerary rainbows on the inside of the primary arc. The shadow of the photographer's head at the bottom of the photograph marks the centre of the rainbow circle (the antisolar point).
Rainbow in Moshav Aviel, Israel
A colourful rainbow and ring-billed gull
Definition on angles
Alexander's band
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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 this phenomenon in Aphrodisias, Commentar
Rainbow
…bands, but that is "down" for the primary and "up" for the secondary. The dark area of unlit sky lying between the primary and secondary bows is called Alexander's band, after Alexander of Aphrodisias, who first described it. Unlike a double rainbow that consists of two separate and concentric rainbow arcs, the very…
Alexander's band lies between the two rainbows.
Dark area between rainbows known as Alexander’s band, with a rare twinned primary