'Hexagonal ice crystals' diaporamas de présentation

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Chapter 15: Light, color and atmospheric optics

Chapter 15: Light, color and atmospheric optics. White and colors White clouds and scattered light Blue skies and hazy days Red suns and blue moons Twinkling, twilight, and the green flash The mirage: seeing is not believing Halos, sundogs, and sun pillars Rainbows

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Natural Light

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Moon Halos.

Moon Halos. On nights with diffuse high clouds and a bright moon, a halo can appear about the moon. This results from light refracting (through an angle of 22 degrees) through hexagonal ice crystals in the atmosphere. The mathematics is as follows:.

318 views • 19 slides