Q. 12 :- Why does the Sun appear reddish early in the morning?
As we know, the Sun light consists of seven colours. Due to the presence of molecules of air and other fine particles in the atmosphere, scattering of visible light into different colours takes place. The colours with shorter wavelengths such as blue are scattered easily than colours with longer wavelengths such as Red. In early morning, as the Sun rises above horizon, light from the Sun has to cover a larger distance in the denser medium of earth’s atmosphere before reaching our eyes. The blue light, due to shorter wavelength get scattered in midway and not visible in the sky. Only Red light having larger wavelength is able to reach our eyes due to less scattering. Hence, the Sun appear reddish early in the morning