why is the sea blue always?why is it not black or green?

Answer 1

Reflection from our earth's atmosphere, which is blue.

"> Why is the sea blue?

There are two reasons for the color of the sea; both of them contribute to the answer.


A. The sea reflects the sky.
You have probably noticed that the sea is not very blue-looking when the sky is overcast. Water reflects and scatters the light that strikes it; this is shown by the fact that you can see your reflection in puddles. When the sky is brilliant blue, the sea is also, because it reflects the blue of the sky. A good answer to why the sky is blue has already been posted at MADSci.

B. The sea refracts light just as the sky does.
Blue light is more easily bent, or refracted, than red light; thus, light refracted back from the surface of the sea appears blue. Furthermore, when you are underwater the water around you appears blue because more blue light is scattered back to your eye than red light. Here are some professional shots to show what I mean.
The scattering of light by the air, or by water, is called Rayleigh scattering. "

Answer 2

You need to get out and look at the water some more. The sea appears black at night time. Close to shore, where there is vegetation growth on the sea floor, the water will appear green.

Answer 3

My Reply is a similar reply
The sky is blue as blue being the shortest wavelenth its reflected the most
Water being able to reflect apears to be blue
But then y is water in a small container not blue
Its bcos small amounts dont get that much reflecting nature of the mirror

More over the ocean is much colorful at some places due to the nature, tiny fish or alge etc

Answer 4

When the sky is brilliant blue, the sea is also, because it reflects the blue of the sky. .

Blue light is more easily bent, or refracted, than red light; thus, light refracted back from the surface of the sea appears blue. Furthermore, when you are underwater the water around you appears blue because more blue light is scattered back to your eye than red light

The scattering of light by the air, or by water, is called Rayleigh scattering.

Answer 5

The sun's rays hit the Earth's atmosphere, where the light is scattered by nitrogen and oxygen molecules in the air. The blue wavelength of this light is affected more than the red and green wavelengths, causing the surrounding air to appear blue. At sunset, the sun's light passes farther through the atmosphere, deflecting and decreasing the blue in the air. Scattering by dust particles and pollution in the air causes the sunset to appear red.

Answer 6

The Blue colour of the sky totally depends upon scattering of light which is shown completely in Raleigh's law.
It is because of this colour of the sky that the sea appears blue.Not only this but the wavelength of blue is very less. Hence the scattering power of blue is very more.

Answer 7

In the first place, the sea is not always blue. It depends upon the depth of the sea. You know refraction?

Answer 8

You know about Raman scattering phenominon.The sea is blue due to the scattering of light in this scattering all colours are missed and only blue is reflected.According to Raman scattering the reflected light frequency gives the properties of material.

Answer 9

Your word 'always' is an operative word. It can be blue, it can be apparently grey in color, it can be numerous colors depending on what's in it or, say, what color be the sky for the given day, which usually of course is blue, since water is a powerful reflector of light spectra.

Answer 10

the sea reflects the sky