my physics teacher told me about the refraction and its applications one of them was
2 minutes of early sunrise and after she explained this effect she concluded that days are
2 minutes longer than one would naively presume.
However, I think that her conclusion is wrong because
if sunrise is considered then sunset should also be considered and according to me sunsets should be 2 minutes late therefore the day time is increased by 4 minutes and not 2 minutes over the naive calculation.
According to me, the situation looks something like this:
Is this idea of mine correct or not? And if we both are wrong, then what should be the right conclusion and why ?