Lake Ontario water colours: What the lake’s hue can tell you — Lake Ontario Waterkeeper

http://www.waterkeeper.ca/blog/2016/9/2/lake-ontario-water-colours-what-the-lakes-hue-can-tell-you

Blue is water’s signature colour. When light shines on a body of water all the wavelengths of light in the light spectrum are absorbed with the exception of the blues, indigos, and violets. Sometimes green light doesn’t get absorbed either. These unabsorbed colours are what we see. Clouds, sunshine, and shadows do beautiful things to the colour of water, making it appear in different shades of blues, purples, blacks, greys, and greens.”

Gabrielle Parent-Doliner

Read on….fascinating

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