Question

why the color of the sky appears to be sky-blue ?

Answer 1

The colour of the sky appears to be sky blue because the molecules in the air scatter more blue light from the sun more than they scattered red light .

Answer 2

During the day time, sky appears blue this is because the size of the particles in the atmosphere is smaller than the wavelength of visible light. So they are more affective in scattering the light of shorter wavelengths( blue end of spectrum). When sunlight passes through the atmosphere the fine particles scatter the blue colour more strongly than red . The scattered blue light enters our eye . Hence the sky appears blue.

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