(a) Scattering of Light: The phenomenon of the change in the direction of propagation of light caused by the large number of molecules, such as smoke, tiny water droplets, suspended particles of dust and molecules of air present in the earth’s atmosphere, is called scattering of light.
(b) The colour of the scattered light perceived by us depends on the size of the particles, i.e.
(i) Very fine particles scatter mainly blue colour.
(ii) Large-sized particles scatter the light of longer wavelengths.
(iii) Enough larger particles scatter the light which may appear white.
