Glossary
- Diffraction: divergent nature of a wave due to its limited size
 - Interference: superposition of light waves whose resulting intensity depends on the phase shifts between them
 - Wavelength ( of a light wave ): distance between two consecutive identical states of the electric ( or magnetic ) field
 - Divergence: defines the maximum angle between the light rays of a beam
 - Interference fringe: bright or dark band caused by light waves interference - bright and dark fringe occur for waves respectively in phase and out of phase with one another
 - Interfringe: distance between two consecutive bright or dark fringes of an interference pattern