Question

Why was sun look reddish colour in morning and evening, white colour in afternoon​

Answer 1

$\huge \bold{ANSWER}$

They are the consequences of the scattering of sunlight by the earth's atmosphere.

$\bold {Sun \: appears \: red \: during \: morning \: and \: evening}$

At the time of sunrise and sunset, the light from the sun has to travel the longest distance of atmosphere to reach the observer. Since the blue light of short wavelength is scattered more, much of it is lost ,while the red light of long wavelength is scattered a little, so it is not much lost. The blue light is almost absent in sunlight reaching the observer and only the red (white - blue = red)light reaches us. As a result, the sum and the region near by it, is seen red.

$\bold {white \: colour \: of \: sky \: at \: noon}$

At noon, sun is directly above our head, so we get the lights rays directly from sun after traveling the shortest distance, without much scattering of any particular colour. Hence the sky is seen white.

Answer 2

hlo mate here is your answer.

So, astronomical objects look redder from Earth than they would from space, because the redder wavelengths from the objects penetrate the atmosphere better than the bluer ones. Incidentally, this is why the sky is blue: blue light from the Sun is scattered in all directions on its way to the Earth.

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