Question

name three phenomenon of dispersion

Answer 1

. Example: Through a window glass light reflects as well as refracts. We can observe the objects through the glass due to refraction (light passes through the glass).
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). However, dispersion also has an effect in many other circumstances: for example, group velocity dispersion (GVD) causes pulses to spread in optical fibers, degrading signals over long distances; also, a cancellation between group-velocity dispersion and nonlinear effects leads to soliton waves.

Answer 2

Formation of rainbow from raindrops.
Formation of 7 colours on passing of light from a prism.