• Question: Why is the sky blue, but the sea sometimes looks green, even though it is reflected?

    Asked by spaice to Arttu, Ceri, James_M, Monica, Philip on 20 Jun 2011.
    • Photo: Arttu Rajantie

      Arttu Rajantie answered on 20 Jun 2011:

      The sky is blue because blue light scatters more from particles in the atmosphere than other colours. I think the sea looks green because green algae make the water green.

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