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Comparison between two rainbows at 20 minutes apart. |
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This composite show the rainbow at 20 minutes apart, respectively 23 (left picture) and 3 minutes (right picture) before the sunset.
Three things are easily visible:
- The rainbow is shifting to the right (the South), because the Sun is shifting to the right (the North) while setting in the Northern Hemisphere.
- The rainbow is taller in the right picture (taken later), because the Sun is lower.
- Green and blue colors still faintly visible in the left picture have disappeared in the right picture, because the Sun lost gradually those two colors to tint itself in red-orange. |
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| Instrument |
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27 mm focal length, composite of 2 pictures |
| Exposure & film |
1/8 & 1/3 s with digital camera Camedia 5060 |
| Date & place |
May 2, 2005, Quimper |
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A Shower of
Stars in Brittany
Brittany by night
in panorama!
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