Answer:
White light is a combination of seven colours (VIBGYOR) . When they passed through prism each wave travels at different speeds (having different energies and wave lengths) split in to seven colours.

This spectacular phenomenon is regarded as Dispersion.

Also in statistics the data from experiments is plotted. The distribution of data or dispersion is characterized by Standard deviation or Variance
Contributor: Alikipalli
First answer by Alikipalli Praveen Kumar Reddy. Last edit by Alikipalli Praveen Kumar Reddy. Contributor trust: 3 [recommend contributor recommended]. Question popularity: 5 [recommend question].