Why is the sky always blue?
firstly its got very little to do with the colour of the sea as light travels from the sun it hits our atmosphere it gets bent and scattered slightly sunlight is composed of all the colours you see in a rainbow the blue colour of the sky is caused by this scattering (called rayleigh scattering) favouring the blue portion of the light hence the sky is blue heres something for you to try get a clear glass of water a torch and some milk shine the torch into the water ten add a few drops of the milk the colour of the beam of light from the torch will slowly change colour with the more milk you add you will eventually see blue hope i helped mate
The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air. However, much of the shorter wavelength light is absorbed by the gas molecules. The absorbed blue light is then radiated in different directions. It gets scattered all around the sky. Whichever direction you look, some of this scattered blue light reaches you. Since you see the blue light from everywhere overhead, the sky looks blue.
