shadow bands

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An optical phenomenon seen fleetingly around the onset of totality in a solar eclipse, comprising slow-moving, low-contrast waves of light and dark, perhaps only a few centimetres broad, seen on light-coloured surfaces on the ground. Shadow bands are presumed to originate from differential refraction of the last remaining segment of sunlight in the cooling upper atmosphere around the path of the total eclipse.

Subjects: Meteorology and Climatology.

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