The scattering of various components of sunlight is purely dependent on the wavelength of the light. Sunlight, reaching the surface of the earth is scattered in all directions by the gases and particles present in the atmosphere. Blue light having shortest wavelength is scattered most by the atmospheric particles. Thus,\xa0sky\xa0appears blue to an observer from the surface of the earth.For an astronaut staying in the international space station orbiting the Earth, the colour of the sky will be black because the light reaching it does not scatter. Scattering is absent at higher altitudes.\xa0
Because the particles of atmosphere are comparatively smaller than the particles of visible light…so theu are effective in scattering the light of shorter wavelength which is blue…so sky appers blue
Sky is blue in color because tiny molecules of air scatter blue light from the sun becoz blue is scattered more than other colors as it travels as shorter smaller waves.So we see a blue sky most of the time……….