Why sun appears oval since sunrire and sunset but circular at noon
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Answer:
due to rotation of earth around sun at every angle
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Answer:
Due to refraction from the earth's atmosphere.
Explanation:
At sunrise and sunset, the sun is at the periphery and due to which, the light from the corners of the sun refract unevenly and this uneven refraction forms an oval shape of the sun to be perceived by our eyes.
The main role played in this phenomenon is by the horizon and the refraction of light.
The twinkling of stars is also due to the refraction of their light by different layers in the atmosphere.
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