apperent duration of a day from sunrise to sunset is 4minutes more than its actual duration. explain.
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During sunrise, when the sun is just below the horizon, our atmosphere causes the light rays to bend and we see the sun early. Similarly, at sunset, the apparent position of the sun is visible to us and not the actual position due to the same bending of light rays effect.
To sum up, due to refraction we see the sun rise about 4 min.. before it’s actually there and during sunset we see it for around 4 minutes more, even though it has already moved from that position.
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