Question

How do
you appreciate the role of molecules in the atmosphere for the blue
colour of the sky ?​

Answer 1

$\bf{}Let's \: Understand:$=>Scattering of sunlight through molecules of atmosphere is the reason for the blue of the sky.

=>Our atmosphere contains atoms and molecules of different sizes.

=>According to their sizes they are able to scatter

different wavelength of light.

For example,

=>the size of the water molecule is greater than the size of the N2 or O2

=>It acts as scattering centre for other frequencies which are lower than the frequency of blue light.

=>Blue colour scatters more than other colours.

=>The absence of molecules there will be no scattering of sunlight and the sky will appear dark.

So,

We should appreciate the molecules which are scattering centres.