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Why does the sky appear blue? why there is advanced sunrise and advanced sunset? why does the sky appears reddish at sun rise and sunset? why does the

planet donot twinkle? describe the formation of


Sky appears blue due to scattering of light.blue colour have lower wavelength scatters less.scattering is due to the presence of dust particles  present in the atmosphere.sky appears red incolour  in morning and evening. at this time light has to travel along distance,since sun rises in east and sets in west.hereduring this time colours of smaller wavelengths will get scattered off and sky appears with colours of longer wavelength ie redcolour,planet is a nonluminous body ieit doesnot have its own colour and it reflect the light of sun
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