What is the reason for apparent flattening of the sun’s disc at sunset and sunrise?

Atmospheric refraction

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Scattering

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Tyndall effect

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Dispersion

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Solution

The correct option is A Atmospheric refraction
During sunset and sunrise the rays from the upper and the lower part of Earth bend at different angles as the lower rays are much slanter. Due to refraction at condiderably different angles the sun appears oval or flattened.

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