Question

The essential condition for Rayleigh’s scattering is the size (x) of scatterer must be

A. Much smaller wave length (ℷ) of light B. Much greater than the wave length of light

C. Equal to wave length of light D. Cannot say​

Answer 1

Answer:

(a) The essential condition for Rayleigh scattering is that size of scatterer (x) must be far less than the wavelength of light

Explanation:

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Answer 2

The correct option for the above question is (A), which is the size of the scatterer must be much smaller than the wavelength of light.

• Rayleigh scattering is the elastic scattering of light or other electromagnetic radiation by particles much smaller than the wavelength of light.
• Rayleigh's scattering theory is reasoned for the red colour of the sun in the morning and the blue colour of the sky.
• Hence, the essential condition for Rayleigh scattering is that size of the scatterer must be far less than the wavelength of light. Elastic scattering means that incident wavelength and scattered wavelength are the same.  
• So the size of the scatterer 'a' should be much less than wavelength λ
• Therefore , a<< λ.