STEPHEN & DONNA O'MEARA / SCIENCE PHOTO LIBRARY STEPHEN & DONNA O'MEARA / SCIENCE PHOTO LIBRARY
Similar to the Green Flash, the Red Flash of the Sun occurs, not at the top, but at the lower limb of the Sun either as the Sun nears the horizon before sunset or shortly after sunrise, as seen here. Owing to refraction effects, the Sun's disk separates into spectral colours, with red being at the lower limb, As the Sun passes through inversion layers in the atmosphere, sections of the red rim can separate and waft away from the disk.
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