# Rayleigh scattering

• B
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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sophiecentaur
Gold Member
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.

hutchphd, Kwabena, pixel and 1 other person
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

davenn
Gold Member
2019 Award
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,