Explain why,when the sun is overhead at noon,it appears white?

(N/A) When the sun is overhead at noon,the light coming from the sun travels a relatively shorter distance through the atmosphere to reach us.
As a result,only a small portion of the blue component of the white light is scattered,while most of the light reaches the observer.
Since the light reaching us from the overhead sun contains almost all its component colours in the correct proportion,the sun appears white.