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The photograph depicts a lush green rolling hill with cirrus clouds during a daytime sky, with mountains far in the background. [1] [2] It was taken by Charles O'Rear, a former National Geographic photographer and resident of St. Helena, California, in the Napa Valley region north of San Francisco, while on his way to visit his girlfriend in ...
The painting measures 50.4 cm × 101.3 cm (19.8 in × 39.9 in). It depicts a relatively flat and featureless landscape with fields of green wheat, under a foreboding dark blue sky with a few heavy white clouds. The horizon divides the work almost into two, with shades of green and yellow below and shades of blue and white above.
View of the night sky in July The day's blue sky, clouds and the Moon. The sky is an unobstructed view upward from the surface of the Earth. It includes the atmosphere and outer space. It may also be considered a place between the ground and outer space, thus distinct from outer space.
Halos are caused by interaction of the light with hexagonal ice crystals present in the clouds which, depending on their shape and orientation, can result in a wide variety of white and colored rings, arcs and spots in the sky, including sun dogs, [56] the 46° halo, [60] the 22° halo, [60] and circumhorizontal arcs.
Sky with Flat White Cloud, also known as Sky above White Clouds I, [29] is an abstract, 1962 painting that was inspired by O'Keeffe's trip to Egypt in the spring of that year. The canvas is horizontal, showing blue and green stripes of color (the sky) at the top, while two-thirds of the portion below (the clouds) is white.
The scattering of direct sunlight on those clouds results in the same polarization pattern. In other words, the proportion of the sky that follows the Rayleigh Sky Model is high for both clear skies and cloudy skies. The pattern is also clearly visible in small visible patches of sky. The celestial angle of polarization is unaffected by clouds.
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The yellow color is due to the presence of pollutants in the smoke. Yellowish clouds caused by the presence of nitrogen dioxide are sometimes seen in urban areas with high air pollution levels. [22] Red, orange and pink clouds occur almost entirely at sunrise and sunset and are the result of the scattering of sunlight by the atmosphere.