What Causes the Blue Color of Sea Water?

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In summary, sea water appears blue due to the absorption of certain wavelengths of light, but not all sea water is blue as it can vary depending on depth, sediment, and sunlight. The color of sea water does not indicate its cleanliness or pollution level, and it differs from fresh water due to its chemical composition. The color of sea water can also change over time due to various factors.
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moatasim23
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Why is the colour of sea water blue?
 
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During rain storms, the sea turns grey.
 
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I find this useful for your question: http://science.mikelopez.com/2007/03/11/why-is-the-sea-blue/
 
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The blue color of sea water is due to the way that light is scattered and absorbed by the water molecules and other particles present in the ocean. When sunlight enters the water, the longer red and yellow wavelengths are absorbed while the shorter blue wavelengths are scattered and reflected back to our eyes. This phenomenon is known as Rayleigh scattering, and it is the same reason why the sky appears blue to us. Additionally, the presence of microscopic organisms, such as phytoplankton and algae, can also contribute to the blue color of the ocean as they contain pigments that reflect blue light. The depth and clarity of the water can also affect the intensity of the blue color. For example, in shallow and clear waters, the blue color may appear more vibrant, while in deeper and murkier waters, it may appear darker or even greenish. Overall, the blue color of sea water is a result of the complex interactions between light and the various components present in the ocean.
 

Related to What Causes the Blue Color of Sea Water?

1. Why does sea water appear blue?

Sea water appears blue because of the way that light interacts with the water molecules and other substances in the ocean. The ocean absorbs most of the red, orange, and yellow wavelengths of light, leaving only the blue light to be scattered back to our eyes.

2. Is all sea water blue?

No, not all sea water appears blue. The color of sea water can vary depending on factors such as the depth of the water, the amount of sediment or algae present, and the angle and intensity of sunlight.

3. Does the color of sea water indicate its cleanliness or pollution level?

No, the color of sea water does not necessarily indicate its cleanliness or pollution level. While some pollutants can give the water a different color, the color of the water alone is not a reliable indicator of its overall cleanliness.

4. How does sea water differ from fresh water in terms of color?

Sea water and fresh water appear different colors due to their different chemical compositions. Fresh water does not contain as many dissolved particles as sea water, so it tends to appear clearer and can reflect more light, making it appear lighter in color.

5. Can the color of sea water change over time?

Yes, the color of sea water can change over time due to various factors, such as changes in the amount of sediment, algae, or pollutants present. It can also appear different colors depending on the time of day and the angle and intensity of sunlight.

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