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CBSE Class 12-science Answered

Explain Polarisation by scattering?  (4marks question ) So please provide accurate answer
Asked by ykadiya99 | 18 May, 2020, 06:26: PM
Expert Answer
 
Light is scattered when it meets a particle of size similar to its own wavelength.
Example: Scattering of sunlight by dust particles.
Rayleigh showed that the scattering of light is proportional to the fourth power of the frequency of light or varies as 1/λ4  ,
where λ is the wavelength of light incident on air molecules of size d and d << λ.
When light scatters from air molecules it produces linearly polarised light in plane perpendicular to the incident light.
 The scattered light strikes the neighbouring atoms and again undergoes same phenomenon.
 The absorption and emission of light continuosly causes scattering of light.
The scattered light is consist of completely polarised light, partially polarised light and unpolarised light.
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