Why does the Sun appear reddish early in the morning?

During sunrise, the light rays from the Sun travel a greater distance in the Earth’s atmosphere before reaching our eyes. In this journey, the shorter wavelengths of light are spread out and only the longer wavelengths reach our eyes. Since blue colour has a short wavelength and red colour has a long wavelength, red colour can reach our eyes after the atmospheric scattering of light. Thus, the Sun appears to be reddish early in the morning.