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The sun was less than 2 degrees above the horizon and the background is starting to take on twilight colours. There is still some blue in the rainbow but it is relatively weak. A faint secondary bow can also be seen to the left. |
With the sun about 7 degrees above the horizon the sky is noticeably less reddened than in the example above.
A yellowish supernumerary is distinctly visible in the lower section of the bow.
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With the sun 12 degrees above the horizon there is no perceptible reddening and the full range of colour is visible in the rainbow. |
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Sunset Rainbows and Solar Altitude |
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