Sun November 27, 2011 By:

apparent flattening of sun's disk at sunrise and sunset

Expert Reply
Sun November 27, 2011
At sunrise and sunset, the sun is near the horizon. The rays of light from the upper part and lower part of the periphery of the sun bend unequally on travelling through earth's atmosphere. That is why the sun appears oval or flattened at the time of sunrise and sunset.
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