Question

Why is sky is blue?
Thanks

Answer 1

The color of sky is due to the property of dispersion of light 

the white light of the colour before reaching the earths surface gets dispersed into its 7 components VIBGYOR 

the molecules present in the atmosphere are capable of scattering only the light with shortest wavelength and hence red light wont get scattered

As the light that we get from sun is white in color and due to atmospheric refraction splitting up of white light takes place and the light with longest wavelength gets lost in the space and blue and violet has shortest wavelength but the intensity of blue will be much more than that of violet which makes us see the sky blue in colour

Answer 2

Blue sky

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Here, the main reason for blue sky is the scattering of the light

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when the earth gets the light from the sun, then the molecules in the air scatter the blue light and red light is not scattered because, the red colour is not acceptable by the molecules of air.

we see the less blue colour in the sunset or the sunrise time because, that time sun doesn't provide a proper light to the earth and that's the reason in sunset time sky is red and in morning sky is blue.

we know that, sun emits the white light, but when the sun emits the white light, then some particles are sent in the space and some particles come to the earth with the voilet and blue colour.

In the all properties of light, Dispersion is the property of light by which the light is scattered