Western Rainbows

We found these dramatic West of Ireland rainbow photographs on file from last year. The second bow was very clear. For those interested in the how and why of rainbows, apparently the second, outer rainbow is caused by sunlight bouncing around inside the raindrops for longer than normal and coming out at 50 degrees instead of the normal 42 degree angle. The darker band of sky between the two bows is called Alexander's Dark Band after the guy from Aphrodisias who described this effect first some 1800 years ago! You can click the photos to enlarge them.



Photos taken 22 November 2000

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