hye friends,
here is the answer to the most popular question: why is sky blue??
http://www.poseidons.net/why-is-the-sky-blue/why-is-the-sky-blue.htm
thnxs I would say this is a more accurate explanation. 
http://www.sciencemadesimple.com/sky_blue.html
This "theory" does not explain why the Earth atmosphere is blue when you look at it from space. I'll bet my money on the explanation given by Bondings.
Edit: added "atmosphere"
Last edited by FunFunkyFritz on Wed Aug 02, 2006 10:45 am; edited 1 time in total | FunFunkyFritz wrote: |
This "theory" does not explain why the Earth is blue when you look at it from space. I'll bet my money on the explanation given by Bondings. |
we are talking abt that the sky is blue not the earth...Bondings is definatly the more accurate answer 
I have no idea what the first theory is on about but I understand Bondings one The second one is more convincable.
| dj_don wrote: |
| FunFunkyFritz wrote: |
This "theory" does not explain why the Earth atmosphere is blue when you look at it from space. I'll bet my money on the explanation given by Bondings. |
we are talking abt that the sky is blue not the earth... |
I know 
I was simply using a basic scientific method of debunking the first theory.
- Find an example where the theory contradicts itself.
But i see now that it was not a good example of contradiction. Here is a better one:
Why is earth the only planet in this solar system with a blue atmospere? They should all look blue according to the theory.Rayleigh scattering has always been the answer to me, I read some contridictions, but they seem to be only speculation.
la dont u know sky is blue. it is the mirror and there is the image of the ocean
cant u
please put this post out i cant do it
Last edited by Coclus on Mon Aug 07, 2006 3:48 pm; edited 1 time in total
because i did it so^^ no i don t know but he isn t really blue or? ^^
The sky is blue because if it doesn't blue, it must not the sky 
The real is the sky blue because of light diffraction phenomenon
(light travel in air with differrent speed of each color) so we see the blue light from sky. I don't want to sound condescending, but this is a science forum. If you're going to address a scientific question, don't provide an answer unless you know it, and have evidence and/or sound scientific theory to support it. I'm not sure what the original link is all about, but it is not scientific in the least. Bondings' link provides a clear and correct explanation for the phenomenon. For those of you who don't feel like reading it, here's the summary:
Molecules in the earth's atmosphere are particularly good at vibrating at the frequency of blue light. Because of this, they absorb it well, and also re-emit it easily. Because this re-emission is in an essentially random direction, it is called scattering, and it sends blue light into your eyes from all directions. Because there is much more unobstructed atmosphere above you than to the side of you, you see a solid blue color above, whereas you can only see the blue laterally if you have a very good view (from the top of a mountain, for instance, things far in the distance are obscured by a blue haze). If the atmosphere did not scatter light, the sky would always look black and star-filled as it does at night; and the stars would be much sharper.
| FunFunkyFritz wrote: |
| Why is earth the only planet in this solar system with a blue atmospere? They should all look blue according to the theory. |
Earth is the only planet that looks blue from space because earth is the only one with significant liquid water on its surface--the atmosphere has little to do with that. The atmosphere, remember, scatters light in random directions--its light is fairly weak, and only adds a blue haze to the predominant brown and green of earth's landmasses, and a fuzzy blue halo around the edges of the planet. Mars, which has no known liquid water, is red because of the high iron content of its surface; Venus is whitish yellow because it is covered in dense sulfur clouds.
Now, if you're asking why the Martian sky, in the Mars rovers' photographs for instance, is not blue the way Earth's is, that is because a) the Martian atmosphere is far thinner than Earth's, and b) the Martian atmosphere has a different composition of gasses from that of Earth, which MAY (I'm not sure of this; look it up if you're curious) not absorb the same wavelengths of light. On the moon, there's virtually no atmosphere, so the sky is black; on Venus and on Titan (a moon of Saturn), the atmosphere is too filled with clouds to have its own color. I don't believe we've observed the sky from any other heavenly bodies. | uunter wrote: |
| FunFunkyFritz wrote: | I was simply using a basic scientific method of debunking the first theory.
- Find an example where the theory contradicts itself.
But i see now that it was not a good example of contradiction. Here is a better one:
Why is earth the only planet in this solar system with a blue atmospere? They should all look blue according to the theory. |
Earth is the only planet that looks blue from space because earth is the only one with significant liquid water on its surface--the atmosphere has little to do with that. The atmosphere, remember, scatters light in random directions--its light is fairly weak, and only adds a blue haze to the predominant brown and green of earth's landmasses, and a fuzzy blue halo around the edges of the planet. Mars, which has no known liquid water, is red because of the high iron content of its surface; Venus is whitish yellow because it is covered in dense sulfur clouds.
Now, if you're asking why the Martian sky, in the Mars rovers' photographs for instance, is not blue the way Earth's is, that is because a) the Martian atmosphere is far thinner than Earth's, and b) the Martian atmosphere has a different composition of gasses from that of Earth, which MAY (I'm not sure of this; look it up if you're curious) not absorb the same wavelengths of light. On the moon, there's virtually no atmosphere, so the sky is black; on Venus and on Titan (a moon of Saturn), the atmosphere is too filled with clouds to have its own color. I don't believe we've observed the sky from any other heavenly bodies. |
| http://www.poseidons.net/why-is-the-sky-blue/why-is-the-sky-blue.htm 'First Theory' wrote: |
Why is the sky blue?
Answer by Jon Bain, Philosopher & Poet
Answer: Because the Sun is Gold.
At night the sky has no colour, nor has the ocean. Both these colorless substances reflect a shadow, the opposite of the colour of the light they are in.
Blue is the complimentary opposite of Gold. |
Ok, but remember that my objective was to prove the first theory wrong by contradiction, or at least find examples where it does not apply (when it should).
IMHO You can't do that if you use the, albeit correct, wavelength and scattering theories side-by-side with the first theory.
Maybe someone else are better suited than me in finding a better contradiction of the first theory? I don't have the time right now.
Edit: Maybe it's as easy as saying that the color of the Sun is NOT gold. But i don't have any, outer space, color measures of the Sun, so i can't prove it.Its simple. It all has to do with lighting and the way the sun hits the earth and all. I want to know why at night is the sky have a purple look to it.
Hmm, so thats why the sky is blue. very interesting.
The sky is blue because the molecules in the air absorpse all the almoust all the spectrum of the light that is coming from the sun. The only frequency that remains is the freqency of the blue light. In the evening the situation is different because of the angle of the light beams that are going trough the atmosphere so it has different color.
The sky is blue because the molecules in the air absorpse all the almoust all the spectrum of the light that is coming from the sun. The only frequency that remains is the freqency of the blue light. In the evening the situation is different because of the angle of the light beams that are going trough the atmosphere so it has different color.
Here here
Now both explanations are nice but I don't regret it when I say that Love is the reason that the sky is blue ... Most of my friends say that ... Now I have the truth and will tell them all MWAHAHAHAHA ...
I think NASA has done a disservice to this whole area of questioning/research, by releasing those doctored photos of the Martian sky from their recent voyage. Just because people assume the sky is red on Mars doesn't mean you should 'photoshop' your digital images to correspond!
then there's the picture of that looney tunes martian photoshopped into the martian picture...but the sun is gold? heh. reminds me of the mobile, alabama leprechaun video...
OK, the explanation by bonding, is too complicated for me to understand so I just want to know when is sky green? WTF?!
| Quote: |
| If the sun went a shade more orange, and then red, so the sky would turn more turquoise, then green. |
(from first explanation) I have never ever seen sky with the littilest shade of green. Am I stupid? i am siding with bondings
If the sun went a shade more orange, and then red, so the sky would turn more turquoise, then green.
Original theorist typing here. The above hypothesis could be phrased:
If we lived under a red sun then the sky would be green.
Not that our sky ACTUALLY has done so.
The whole scattering theory is no theory. It begs the question. In what way does rayleigh scattering differ from the way other substances obtain their color? Why does it need a new theory?
And why is the sea and the sky EXACTLY the same hue?
And why is this EXACTLY opposite to the sun's color.
The space q:
Our sun is still the source of light in when in space. Why should space effect anything?? Unless we were near another star altogether.
To falsify the idea, would be to take a blue light bulb, and a yellow one, and observe the colors of the shadows cast in their light.
You will notice, that the blue light, casts a brown-gold shadow, and the yellow one, a bluish shadow.
(Try red and green bulbs too)
At night the moon reflects a pale yellow color: the opposite to the deep indigo tinge it has at night. This is why it can look a deep dark purple color. But only if the moon is out. During new moon the sky is pitch black.
The sun is more orange than the moon, which brings the sky's color back to perfect azure in daylight.
Notice that in cloudy weather, the sea is grey.
The perfect nature of color opposition is a 100% straight line graph.
You cannot get a better example of science than a straight line graph.
A straight line graph is in fact the only real science.
Note especially that we are dealing here with substances that have no intrinsic color of their own.
The whole mystery must yet unravel, but once you have understood the basics of the theory of color in light, then any other answer just seems like contradiction, not argument.
Try and imagine living under a blue sun. To see all the colors of the rainbow, we would need a backdrop to contrast the blue of the blue sun.
;-j
"they should all look blue according to this theory"
Planets that have a surface consisting of a colorless substance would all look blue. However, the other 11 planets consists of opaque substances.
Thus all waterworlds appear blue under a gold sun. There are unfortunately no planets close enough to observe in this way.
The essence to the question is:
HOW DO COLORLESS SUBSTANCES (eg see & air) OBTAIN COLOR?
