The sun seems to rise before it actually rises and it seems to set long after it actually sets. Explain why.

The sum seems to rise before it actually rises and it seems to set long after it actually sets. Explain why.

Why does the sun seem to rise two minutes before the actual sunrise and set minutes after the actual sunset ? Explain with the help of a labelled diagram.

It is said that the sun becomes visible before the actual rise and remains visible even after the actual setting. This makes the day a bit longer. It happens due to :

We can see the sun before the actual sunrise by about :

The sun is seen a little before it rises and for a short while after it sets. Explain, why ?