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History
Marcel Minnaert
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Marcel Gilles Jozef Minnaert was a Belgian-Dutch astronomer. He was born in Bruges and died in Utrecht. He is notable for his contributions to astronomy and physics and for a popular book on meteorological optics: Light and colour in the open air, first published in English in 1940.
Minnaert in 1967
Minnaert in 1967
Atmospheric optics
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Atmospheric optics is "the study of the optical characteristics of the atmosphere or products of atmospheric processes .... [including] temporal and spatial resolutions beyond those discernible with the naked eye". Meteorological optics is "that part of atmospheric optics concerned with the study of patterns observable with the naked eye". Nevertheless, the two terms are sometimes used interchangeably.
A colorful sky is often due to indirect sunlight being scattered off air molecules and particulates, like smog, soot, and cloud droplets, as shown in
A colorful sky is often due to indirect sunlight being scattered off air molecules and particulates, like smog, soot, and cloud droplets, as shown in this photo of a sunset during the October 2007 California wildfires.
When seen from a high altitude, as here from an airplane, the sky's color varies from pale to dark at elevations toward the zenith.
When seen from a high altitude, as here from an airplane, the sky's color varies from pale to dark at elevations toward the zenith.
Purple sky on the La Silla Observatory.
Purple sky on the La Silla Observatory.
An occurrence of altocumulus and cirrocumulus cloud iridescence
An occurrence of altocumulus and cirrocumulus cloud iridescence