why does sun appear as a flat disc during sunrise and sunset?
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It is due to the refraction of sunlight as it travels through Earth's atmosphere. ... Refraction of light by these layers can make the sun appear flattened or distorted. Objects closer to the horizon are raised upwards most and the lower limb of the Sun is raised more than the top making it appear oval.
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it is due to the refraction of sunlight as it is travel through earth's atmosphere
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