Commons:Featured picture candidates/File:Ponte Barca Abril 2019-1c.jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search
[edit]

Voting period is over. Please don't add any new votes.Voting period ends on 27 May 2019 at 17:56:01 (UTC)
Visit the nomination page to add or modify image notes.

Ponte da Barca, bridge over Lima river
Alvesgaspar, why isn't Daniel's comment below proof that the color of the sky is off? As he points out, the sky's reflection in the water is blue, not aqua. Can you explain that? -- Ikan Kekek (talk) 06:16, 23 May 2019 (UTC)[reply]
Ikan, scientifically speaking it is actually possible for the reflection of the sky to be a noticeably different colour to the sky itself. The idea that water is a perfect mirror is not actually true, and bodies of water don't appear blue only because they're reflecting the colour of the sky; instead water itself is intrinsically slightly blue. And therefore it should be expected that a light blue/aquamarine sky should be given a deeper blue tinge in its reflection. I don't think there's anything especially implausible about the difference in blue colours between the sky and its reflection here. Cmao20 (talk) 15:29, 26 May 2019 (UTC)[reply]
  • Thank you Cmao20, you are quite right. We know, for example, that lower wavelengths (reds) are absorbed in the upper layers making reflections bluer. Other conditions have direct effects on the color of the water (and thus on the reflected sky) such as depth and the presence of organic matter. -- Alvesgaspar (talk) 15:56, 26 May 2019 (UTC)[reply]
  • The water from my tap doesn't look blue to me. I take note of this explanation, though. That great a difference in the colors of the sky and the reflection is hard for me to accept, but I wasn't there. -- Ikan Kekek (talk) 23:31, 26 May 2019 (UTC)[reply]
  • Ikan, the only reason the water from your tap doesn't look blue is there isn't enough of it. Relatively small amounts of water appear colourless, but pure water definitely does have a slight blue tinge, and this becomes deeper blue - and more obvious to see - as the thickness of the sample of water increases. As Alvesgaspar points out, the colour of water can also be affected considerably by impurities or substances dissolved in it. Cmao20 (talk) 18:30, 27 May 2019 (UTC)[reply]
  •  Comment Daniel, your argument doesn't make sense to me. A blue apple being reflected in a weird surface making it look red there doesn't fix the color of the real apple, right? – Lucas 18:04, 21 May 2019 (UTC)[reply]
@Lucasbosch: Is the sky in this image red like an apple? Daniel Case (talk) 18:40, 21 May 2019 (UTC)[reply]
Confirmed results:
Result: 18 support, 1 oppose, 0 neutral → featured. /--BoothSift 21:06, 27 May 2019 (UTC)[reply]
This image will be added to the FP gallery: Places/Architecture/Bridges
Retrieved from "https://commons.wikimedia.org/w/index.php?title=Commons:Featured_picture_candidates/File:Ponte_Barca_Abril_2019-1c.jpg&oldid=352116152"