How can we explain the reddish appearance of the Sun at sunrise or sunset? Why does it not appear red at noon?

(N/A) At sunrise or sunset,the Sun is near the horizon. The light from the Sun has to travel a larger distance through the Earth's atmosphere to reach the observer. During this journey,most of the blue and shorter wavelengths of light are scattered away by the atmospheric particles. Therefore,only the light of longer wavelengths,such as red,reaches our eyes,making the Sun appear reddish.
At noon,the Sun is overhead,and the light travels a relatively shorter distance through the atmosphere. Consequently,only a small amount of blue and violet light is scattered,and the Sun appears white or slightly yellowish.