Question

explain the difference in colours of the as it appears during sunrise and sunset and noon with scaterring of light

Answer 1

This is because of scattering of light. Duringsunrise and sunset, sun is red in colour while at noon, the sun appears white as only a little of the blue and violet coloursare scattered. Near the horizon, most of the blue light and shorter wavelengths are scattered away by the particles during sunrise and sunset.

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Answer 2

Sun appears red at sunrise and sunset : At sinrise and sunset, sun is closer to the horizon. The sunlight passes through denser layer of air and covers larger distance before reaching our eyes. Most of the blue light gets scattered. The light that reaches our red. That is why the sun appears red at sunrise. 

At noon, the sun is overhead. The sunlight passes through rares layers of air and covers shorter distance before reaching our eye. So, almost all colours of light are scattered equally. Hence the sun appears white