eli5: Why is water clear in small quantities but blue when in large quantities?
In: 3
Water is the same color regardless of the quantity. It’s just more obvious the more of it you are looking through. It’s also easier to see if you’re looking at water in a white container. The reason is that the light coming in goes through the water, hits the white bottom, then travels back through the same water a second time. we have a white bathtub and you can see the blue water when it’s only half full.
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