🌐한국어EnglishDeutschEspañolFrançaisPortuguêsРусскийالعربيةفارسی한국어中文日本語EntityQ1852282· pop 17· linked from 87 articles반사 계수measure of wave reflectivityAvailable in 17 languagesEspañolDeutsch中文РусскийPortuguêsالعربيةCatalanCroatianMalayNorwegianConnectionsphasorEntityimpedance matchingEntityCategoriesDimensionless numbers of physicsElectronic engineeringGeometrical opticsPhysical opticsSeismology measurementTelecommunication theory