Question

define dispersion of light .How is scating of light different from it dispersion. a) Give one example of phinominal based on each of these b)A beam of light consisting of red, blue and yellow is indicate on the prism as shown reflected and emerged ray

Answer 1

In simple words, dispersion is the phenomenon of splitting up of a composite light into its component colours. The light which we see is actually composed of seven different coloured light-rays of different wavelength. (Example: Sunlight). When a composite light passes through a prism, the component colours undergo deviation at both refracting faces. The extent of deviation depends on the wavelength. This results in splitting up of the composite light.


Examples of dispersion. The most familiar example of dispersion is probably a rainbow, in which dispersion causes the spatial separation of a white light into components of different wavelengths (different colors).


Scattering occurs when light or other energy waves pass through an imperfect medium (such as air filled with particles of some sort) and are deflected from a straight path. A great example is when the Sun's rays pass through clouds. The light is deflected off of its straight path and scatters in many directions.