WDiffraction
WDiffraction from slits
WAcousto-optics
WAddressed fiber Bragg structure
WAiry disk
WArago spot
WAtmospheric diffraction
WBragg plane
WCoherent diffraction imaging
WDiffraction grating
WDiffraction spike
WDiffraction-limited system
WDiffractive beam splitter
WEchelle grating
WElectron backscatter diffraction
WFiber Bragg grating
WFresnel diffraction
WFresnel integral
WFresnel zone
WGreninger chart
WHuygens–Fresnel principle
WInternational Centre for Diffraction Data
WKikuchi lines (physics)
WLong-slit spectroscopy
WLow-energy electron diffraction
WMultifocal diffractive lens
WMultipole density formalism
WNeutron diffraction
WNew Worlds Mission
WPowder diffraction
WPrecession electron diffraction
WReciprocal lattice
WSchaefer–Bergmann diffraction
WSelected area diffraction
WSurface equivalence principle
WTalbot effect
WEnergy-dispersive X-ray diffraction
WX-ray crystallography
WZone axis