Understanding Rayleigh Scattering and Changing Sky Colors

In summary, the color of the sky is determined by the size of the atmospheric particles, their individual wavelengths, and the distance they travel before reaching the Earth's atmosphere. The shorter wavelength of blue light causes it to be scattered more, making the sky appear blue. When the distance the particles travel is increased, red and orange light can also be scattered, resulting in a red or orange appearance. This process is known as Rayleigh scattering and is highly dependent on wavelength. There is no specific list of elements that can be replaced to change the color of the sky, as it is mainly determined by
  • #1
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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  • #2
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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  • #3
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
 
  • #4
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,
 

Related to Understanding Rayleigh Scattering and Changing Sky Colors

What is Rayleigh Scattering and how does it affect the color of the sky?

Rayleigh Scattering is a phenomenon in which particles in the Earth's atmosphere, such as molecules of nitrogen and oxygen, scatter sunlight in all directions. This scattering is more effective for shorter wavelength light, such as blue and violet, which is why the sky appears blue during the day.

What causes the color of the sky to change at different times of the day?

The color of the sky changes throughout the day due to the angle of the sun's rays as it moves across the sky. During sunrise and sunset, the sun's rays have to travel through more of the Earth's atmosphere, causing more scattering and giving the sky a red or orange hue.

Can other factors, such as air pollution or weather, affect the color of the sky?

Yes, air pollution can have an impact on the color of the sky. Pollutants in the atmosphere can absorb and scatter sunlight, altering the color of the sky. Weather conditions, such as clouds and humidity, can also affect the way sunlight is scattered, leading to different shades of blue or gray in the sky.

Why does the sky appear darker at higher altitudes?

The density of the Earth's atmosphere decreases as altitude increases. This means there are fewer particles available to scatter sunlight at higher altitudes, resulting in less scattering and a darker appearance of the sky.

Are there other factors that can influence the color of the sky, besides Rayleigh Scattering?

Yes, there are other factors that can affect the color of the sky. For example, the presence of other particles in the atmosphere, such as dust or water droplets, can also scatter sunlight and impact the color of the sky. Additionally, the type and amount of gases in the atmosphere can also play a role in the color of the sky.

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