Young's double-slit experiment: Young's double-slit experiment is an experiment that demonstrates the wave nature of light by passing it through two closely spaced slits and observing the resulting interference pattern.
Diffraction grating: A diffraction grating is a device with many closely spaced parallel slits or lines that can separate light into its component wavelengths.
Coherence: Coherence refers to the property of waves having a constant phase relationship, which is necessary for producing stable and predictable interference patterns.