Question

write a short note on scattering of light

Answer 1

Selective scattering (or Rayleigh scattering) occurs when certain particles are more effective at scattering a particularwavelength of light. Air molecules, like oxygen and nitrogen for example, are small in size and thus more effective at scattering shorter wavelengths of light (blue and violet). The selective scattering by air molecules is responsible for producing our blue skies on a clear sunny day.

Another type of scattering (called Mie Scattering) is responsible for the white appearance of clouds. Cloud droplets with a diameter of 20 micrometers or so are large enough to scatter all visible wavelengthsmore or less equally. This means that almost all of the light which enters clouds will be scattered. Because all wavelengths are scattered, clouds appear to be white.

When clouds become very deep, less and less of the incoming solar radiation makes it through to the bottom of the cloud, which gives these clouds a darker appearance.

Answer 2

Hey buddy here's your answer ☺☺

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Just about everything in the atmosphere can scatter light (some particles and gases might absorb light).  These scatterers fall into two categories:

(1) those that have sizes equal to or greater than the wavelength of the light being scattered and

(2) those that are much smaller.  Air molecules fall into the 2nd group.  Members of this group scatter short wavelengths of light much more readily than long wavelengths.

Two things to notice about the scattered light: first it is much weaker than the unscattered sunlight and is safe to look at (imagine if that weren't the case and it was dangerous to look at the sky), second the light is blue because it is mainly the shorter wavelengths that are being scattered.

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