[tex]due \: to \: the \: lower \: wavelength \: in \: blue.[/tex]
In order to say that why the sky is blue? Then, this is your answer.
Sunlight is made up of all the colours namely (VIBGYOR) and forms a white light as you studied it in your classes. The colour which having a shorter wavelength would be emitted to the sky.
Blue having a shorter wavelength. So, the sky appears blue.
