<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>4770</termId><termName>Área 2. Óptica física</termName><termType>PT</termType><termLanguage>es</termLanguage><termVocabulary>INDICES DE MATERIAS</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>Área 2. Óptica física</termSortkey><termCreatedDate>Área 2. Óptica física</termCreatedDate><relation><relationType>BT</relationType><termId>4764</termId><termName>ÓPTICA (Índice)</termName><termType>TT</termType></relation><relation><relationType>NT</relationType><termId>4774</termId><termName>Difracción</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>4788</termId><termName>Fotónica</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>4775</termId><termName>Fourier, Óptica de</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>4790</termId><termName>Holografía</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>4803</termId><termName>Interferencia (Luz)</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>4797</termId><termName>Láser</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>4800</termId><termName>Luz - Difusión</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>4784</termId><termName>Óptica adaptativa</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>4771</termId><termName>Óptica física</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>4785</termId><termName>Optoelectrónica</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>4772</termId><termName>Teoría electromagnética</termName><termType>PT</termType></relation></term>  </Zthes>