You see, all colours have wavelengths that are diffused by oxygen and nitrogen, since blue is the shortest wavelength, it's diffused up to 10 times more.
And thats why the sky is blue..... wait, the sea? Uh... because, if it were green... then it would be confused with land.... and everyone would drown in the endless green plains.
Maybe.
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Originally posted by Malion: You see, all colours have wavelengths that are diffused by oxygen and nitrogen, since blue is the shortest wavelength, it's diffused up to 10 times more. And thats why the sky is blue..... wait, the sea?
Actually the sea isn't blue. The sky is, as Malion explains above. If you take a transparent bucket and scoop some water out of the sea, it would in fact be clear. But given the reflective properties of the water, the sea appears blue because it's mirroring the sky.
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Yeah, I would have said that... but I didn't want to sound Hermonineish. XD
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Originally posted by Malion: You see, all colours have wavelengths that are diffused by oxygen and nitrogen, since blue is the shortest wavelength, it's diffused up to 10 times more. And thats why the sky is blue..... wait, the sea?
Actually the sea isn't blue. The sky is, as Malion explains above. If you take a transparent bucket and scoop some water out of the sea, it would in fact be clear. But given the reflective properties of the water, the sea appears blue because it's mirroring the sky.
That's not entirely true. Water, a bit like the sky, also has an absorption fetish for the red end of the spectrum, giving it a very slight blue tinge, only visible in huge quantities. That's why the sea can remain blue when there's a red sunset etc. That's also why it's unfair to fill a bucket with water and claim it's completely colourless - by the same token, it's unfair for me to give you an empty glass box as proof that air is colourless. Snow and ice can actually seem blue as well. That said, the blue light from the atmosphere is reflected, which can significantly contribute to the blue colour of the ocean/sea.
Originally posted by Malion: You see, all colours have wavelengths that are diffused by oxygen and nitrogen, since blue is the shortest wavelength, it's diffused up to 10 times more. And thats why the sky is blue..... wait, the sea?
Actually the sea isn't blue. The sky is, as Malion explains above. If you take a transparent bucket and scoop some water out of the sea, it would in fact be clear. But given the reflective properties of the water, the sea appears blue because it's mirroring the sky.
That's not entirely true. Water, a bit like the sky, also has an absorption fetish for the red end of the spectrum, giving it a very slight blue tinge, only visible in huge quantities. That's why the sea can remain blue when there's a red sunset etc. That's also why it's unfair to fill a bucket with water and claim it's completely colourless - by the same token, it's unfair for me to give you an empty glass box as proof that air is colourless. Snow and ice can actually seem blue as well. That said, the blue light from the atmosphere is reflected, which can significantly contribute to the blue colour of the ocean/sea.
Damn you stealing what I was going to say again Clearly I would have said it better though.
Interestingly enough, D2O does not absorb in the red region, right? It's colour is only due to the light scattering effect. Or did I just make that up... hmm.
Well it absorbs the red end, just not as much as it does the violet/blue end - that said, D2O's absorption of the visible spectrum is quite a bit more uniform than H2O's.
I suppose if the oceans were full of hard water, and you looked at earth from space, the earth would look red.
I thought the sea was blue because it was reflecting the sky?
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Originally posted by Him: Well it absorbs the red end, just not as much as it does the violet/blue end - that said, D2O's absorption of the visible spectrum is quite a bit more uniform than H2O's.
I suppose if the oceans were full of hard water, and you looked at earth from space, the earth would look red.
...just like mars
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Clearly I would have said it better though. 
