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In Rayleigh scattering of light, the intensity of the scattered light is proportional to

Question and options

In Rayleigh scattering of light, the intensity of the scattered light is proportional to
  1. 1/λ41/\lambda^4
  2. 1/λ21/\lambda^2
  3. λ2\lambda^2
  4. λ3\lambda^3

Answer and explanation

Correct answer: A - \(1/\lambda^4\)
In Rayleigh scattering, by particles much smaller than the wavelength, the scattered intensity is proportional to 1/λ41/\lambda^4. Shorter (blue) wavelengths are therefore scattered far more strongly than red, which is why the clear sky looks blue.

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