What is advanced sunrise nad delayed sunset?explain.

Asked by Anshumaan | 12th Mar, 2017, 12:08: PM

Expert Answer:

Advanced sunrise and delayed sunset are phenomena caused due to atmospheric refraction. In this the Sun appears to rise early by 2 minutes and set late by 2 minutes.
The diagram below shows this phenomenon.
 
When the rays from the Sun hit the atmosphere they get refracted. Due to this the Sun appears to be at an apparent position which suggests that it has already risen. The same happens when the Sun sets. After setting the Sun still appears in the sky due to the same refraction phenomenon.
 
This entire sequence is a result of difference in the refractive index of atmosphere.

Answered by Romal Bhansali | 12th Mar, 2017, 05:47: PM