Question

difine desperation of light how is scattering of light different from it's dispersion give one example​ of natural .

Answer 1

Dispersion: The phenomenon of splitting up of a white light into its constituent colours is called as dispersion. White light contains many wavelengths ( it contains lights of many wavelengths(colours)).Since their wavelengths are different, their speeds are different in a medium, but in vacuum all the wavelengths travel with the same speed. In a material medium, the speed of different wavelengths are diferent. So when a beam of white light passes through a medium, the material medium splits the white light into different components. This phenomenon is called dispersion.  When white light passes through a prism, it spreads out into a band of seven colours,VIBGYOR. This band of colours obtained is called spectrum.Dispersion of light results in the formation of a spectrum.

  Scattering of light: Scattering of light is the deviation of light rays from its straight path. As light propagates through the atmosphere, it travels in a straight path until it is obstructed by bits of dust or gas molecules in the atmosphere. The process in which light gets deflected by the particles in the medium through which the light pases is called scattering. Here it is not the splitting of light on the other hand here the incident beam of light just get redirected after being striked by the atmospheric particles. The blue colour of the sky is due to the scattering of sunlight by the molecules of air . During sunrise and sunset sunlight has to travel greater distance , so shorter wavelengh gets scattered off and removed and only red wavelengths reach us.

Answer 2

Dispersion : Dispersion of light is the conversion of white light into spectrum due to refraction. e.g. Rainbow

Scattering : Scattering of light is caused by minute particles present in our atmosphere.The light is diffused which leads to the changing of the sky colour .