Why is the sea blue?

The sea is blue mainly because:

• The sea reflects light from the sky.
• Although some scientists don;t agree with this, water reflects and scatters the light that strikes it. This can be shown by your reflection in the water . When the sky is brilliant blue, the sea is also blue, because it reflects the blue of the sky.

• The sea refracts light like the sky.
• Blue light is more easily bent, or refracted, than red light.Therefore, light refracted back from the surface of the sea appears to be blue. When you are underwater the water around you appears blue because more blue light is scattered back to your eye than red light.

This is a good cite for the answer: http://www.madsci.org/posts/archives/dec96/848799227.Es.r.html

Visit this cite for more information on why the sea might appear green too: http://answers.yahoo.com/question/index?qid=1006022203440

References

• http://www.madsci.org/posts/archives/1998-02/887691022.Bc.r.html
• http://answers.yahoo.com/question/index?qid=1006022203440
• http://www.enotes.com/science-fact-finder/earth/why-sea-blue