What is the phenomenon makes us see the sun a few minutes before and after the actual sunrise and sunset?
Answers
It's all about refraction.Not only we observe advanced sunrise but also delayed sunset.This is because when light enters from vacuum to earth's atmosphere,it basically enters from rarer to denser medium and bends towards horizon.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...
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Sunrise is defined as the moment that the Sun first appears over the horizon. ... This is because of the refraction of the light from the Sun by the Earth's atmosphere--the Earth's atmosphere bends the path of the light so that we see the Sun in a position slightly different from where it really is.
