For 10 points, name this sort of diffraction which happens when its namesake number is greater than one, also called near-field diffraction.
This phenomenon is used in devices that use quantum reflection and ridges at a specific grazing angle to reflect individual particles. In addition to its use in ridged atomic mirrors, this phenomenon uses a namesake approximation that only applies when the angle involved in this happening is small. This phenomenon only occurs when the square of the aperture size divided by the distance to the aperture from a screen and the wavelength is greater than or approximately one. It occurs because incident waves that have been diffracted already propagate themselves. For 10 points, name this sort of diffraction which happens when its namesake number is greater than one, also called near-field diffraction.
This phenomenon is used in devices that use quantum reflection and ridges at a specific grazing angle to reflect individual particles.
{Fresnel} diffraction [accept {near}-{field diffraction} before mention]