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why we see sun before sun rise?

Asked by 12th September 2013, 11:49 AM
Answered by Expert

This is due to the refraction of light coming from the sun.Because when light comes from the sun it generally travel from rarer medium to denser medium i.e., it travels from space[vaccum] to the earth 's atmosphere[full of air].

Advanced sunrise:- it is due to that when the sun is below the horizon at that time the light from the sun enters to earth 's atmosphere from space at get refracted away from the normal line of sun and it causes advanced sunrise.

Answered by Expert 12th September 2013, 12:06 PM
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