Why does the sun become visible even before it actually rises above the horizon at sunrise ?

Why does the Sun appear white at noon ?

Why does the sun appear reddish early in the morning ?

The sun is seen two minutes earlier than the actual sunrise and the sun is seen for two minutes more even after the actual sunset. Why?

Why does the Sun appear reddish at the sunrise and the sunset ?

Why does the Sun look reddish at the time of Sunrise and Sunset ?

Why does the water rise in a capillary tube Explain .