SCATEERING OF LIGHT Atoms or molecules which are exposed to light absorb light energy and emit some part of the light energy in different directions. This is the basic process happens in scattering of light. The effect of light on a molecule or an atom depends on the size of atom or molecule. If the size of the particle (atom or molecule) is small, it will be affected by higher frequency (lower wave length) light and vice versa. Actually we can see different colours because of scattering of light. When molecular size (of the molecules of an object) are comparable to wave length of a particular colour then that object will scatter that particular colour. Let us observe some examples in the nature. BLUE COLOUR OF SKY We know that our atmosphere contains different types of molecules and atoms. The reason for blue sky is due to the molecules N 2 and O 2 . The sizes of these molecules are comparable to the wavelength of blue ...
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