why there is advanced sunrise and delayed sunsets.........

Asked by Chandranath Jha | 12th Mar, 2011, 03:49: AM

Expert Answer:

Dear student

Advance sunrise and delayed sunset

The Sun is visible to us about 2 minutes before the

actual sunrise, and about 2 minutes after the actual

sunset because of atmospheric refraction. By actual

sunrise, we mean the actual crossing of the horizon by

the Sun. Fig. 11.10 shows the actual and apparent

positions of the Sun with respect to the horizon. The

time difference between actual sunset and the apparent

sunset is about 2 minutes. The apparent flattening of

the Sun’s disc at sunrise and sunset is also due to the

same phenomenon.


Hope this clarifies your doubt.




Answered by  | 12th Mar, 2011, 09:57: AM

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