<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">diffraction</topic></authority><related type="narrower"><topic>electron diffraction</topic></related><related type="narrower"><topic>x-ray diffraction</topic></related><related type="narrower"><topic>neutron diffraction</topic></related><related type="broader"><topic>physical sciences concepts</topic></related> <note xml:lang="en"><![CDATA[ The changing or bending of waves, especially sound and light waves, as they pass by and around obstacles in their path. ]]></note></mads>