Why does sky appear blue on a clean day e/ is the sky really blue

Why Does sky appear blue  if you the  is the sky really blue and then is for you 

Because ,here  Blue colour of sky is due to dispersion of light  Iwill give interesting fact

WHY DOES THE COLOR OF THE SKY APPEAR BLUE

The  atmosphere around the earth is air .it contains molecules of many types of gases 

and water droplets or steam .and the highest among the gases is about 78 percent 

nitrogen and about 21 percent oxygen .also there is argon gas and water .

It contains dust ,and salt from sea water etc.we think the color of 

our sky is because of these things .Actually What we call color is waves .

or things in the air are blocking these waves. Longer waves have less 

interference