In addition, Mie scattering of white light due to larger particles (larger than the wavelength of the light) also occurs. Mie scattering tends to desaturate the color of the sky (because it adds more white light to the sky).
The other attributes of infrared photographs include very dark skies and penetration of atmospheric haze, caused by reduced Rayleigh scattering and Mie scattering, respectively, compared to visible light.
It's the result of scattering of light both by dust particles in the atmosphere and the molecules of the atmosphere itself Rayleigh scattering from the molecules, Mie scattering from the dust).
See also: Landscape, Highlights, Back, Image, Photography
 
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