River Colour

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bainbrig | 20:55 Wed 10th Oct 2018 | Travel
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What makes a river blue (like the Nile south of Luxor)? Is there something in the rocks?



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things are blue when the blue end of the spectrum is scattered more than the red end because it is a shorter wave length.
lot of different factors IMHO, not least what time of day and tide times
Question Author
The Nile. Blue sky, blue water.

The Thames. Blue sky, murky brown water.

So not a reflection then. (or, the sea, blue sky, green sea).

Caribbean, blue sky, blue sea.

A layman’s explanation please!
The reason the Caribbean sea is blue is because the sea bed is sand. You won't get a (pale) sea if the bed is rock
Question Author
Why is most sea off the UK greenish?

Why is most sea when seen from a plane greenish?

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River Colour

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