why is advance sunrise and delayed sunset
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Advanced sunrise and delayed sunset happens due to refraction of light.
When the light travels from rarer to denser medium it bends towards the normal and when light travels from denser to rarer medium it bends away from the normal.
The light rays from the sun intially travels through vaccum(rarer) and then through earth's atmosphere(denser)
During sunrise the light rays bend and the apparent position of sun is visible to us before the actual sunrise.
Refraction of light is the cause for delayed sunset also.
When the light travels from rarer to denser medium it bends towards the normal and when light travels from denser to rarer medium it bends away from the normal.
The light rays from the sun intially travels through vaccum(rarer) and then through earth's atmosphere(denser)
During sunrise the light rays bend and the apparent position of sun is visible to us before the actual sunrise.
Refraction of light is the cause for delayed sunset also.
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