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.
A beautiful double rainbow, thanks..nice wallpaper!
wonderful!
Double rainbow all the way!!!! :D
nice rainbow, +1
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.
alexanders band:) 1fd
I love rainbows :) this is beautiful! fav+1d
Beautiful :)
I lived in Florida for a while and there are lots of double rainbows! Great photo!
wonderful !!! +1+fav+d
[B]We seldom see rainbows in double! Fascinating!![/B]
great:)
[B]Amazing view[/B]
Lovely:)
Such a lovely image...love the rainbow! FAV+1