Understanding Rayleigh Scattering and Changing Sky Colors

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    Rayleigh Scattering
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Discussion Overview

The discussion revolves around Rayleigh scattering and its role in determining the color of the sky, particularly focusing on how different atmospheric conditions might change the sky's color to orange, yellow, or other hues. Participants explore the underlying physics, including the effects of particle size and wavelength on scattering, as well as the implications of atmospheric density.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants assert that Rayleigh scattering is responsible for the blue color of the sky and inquire about the elements that could be altered to achieve different colors.
  • One participant references the wavelength dependence of scattering, noting that Rayleigh scattering favors blue light over red due to its shorter wavelength, while Mie scattering shows less dependence on wavelength.
  • Another participant explains that the color of the sky is influenced by the size of atmospheric particles and the distance light travels through the atmosphere, suggesting that longer paths can lead to red or orange hues.
  • There is a challenge to the clarity of the explanation regarding how atmospheric conditions affect sky color, with one participant pointing out perceived contradictions in the reasoning presented.

Areas of Agreement / Disagreement

Participants express differing views on the clarity and coherence of explanations regarding the factors influencing sky color, indicating that there is no consensus on the reasoning provided.

Contextual Notes

Some statements rely on assumptions about atmospheric conditions and the nature of scattering, which may not be fully articulated or agreed upon by all participants.

Rainbows_
Rayleigh scattering is what caused the sky to be blue.. what elements must be replaced to make the sky orange, or yellow or other colors? Is there a list of elements somewhere for the different colors?
 
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If you look at this link and follow through to later pages, you will see that the scattering is highly wavelength dependent. There is a sharp slope to the Rayleigh curve that promotes blue over red for all sorts of particles. Whatever the absolute level of scattering, you will still get a blue bias. (Remember, the optical range is only about an octave)
If you look at Mie scattering (for larger scattering particles) there is less wavelength dependence (as the link points out, the scattered light around the overhead Sun is not coloured.
The redness of the sun at sunset is due to the long path length of the light through the atmosphere (grazing) which has subtracted the blue wavelengths.
I guess you could expect the sunset sky to look more red if there were a much more dense atmosphere.
 
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Rainbows_ said:
Rayleigh scattering is what caused the sky to be blue.. what elements must be replaced to make the sky orange, or yellow or other colors? Is there a list of elements somewhere for the different colors?
The sky's colour mainly depends on the size of the atmospheric particles, their individual wavelengths and the distance they travel before reaching the Earth's atmosphere. What makes the sky blue is the fact that blue has a short wavelength, causin it to be scattered more and thereby making the sky appear blue, when the distance the atmospheric particles travel before they hit the Earth's atmosphere is lenghthened however, these particles are scattered for a longer period of time, allowing red/orange light to be scattered more than blue, making the sky appear red/orange
 
Kwabena said:
The sky's colour mainly depends on the size of the atmospheric particles, their individual wavelengths and the distance they travel before reaching the Earth's atmosphere. What makes the sky blue is the fact that blue has a short wavelength, causin it to be scattered more and thereby making the sky appear blue, when the distance the atmospheric particles travel before they hit the Earth's atmosphere is lenghthened however, these particles are scattered for a longer period of time, allowing red/orange light to be scattered more than blue, making the sky appear red/orange
that doesn't even begin to make sense as you are contradicting yourself
eg ….

The sky's colour mainly depends on the size of the atmospheric particles, their individual wavelengths and the distance they travel before reaching the Earth's atmosphere...

and

when the distance the atmospheric particles travel before they hit the Earth's atmosphere is lenghthened however,
 

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