🌐EnglishEnglishDeutschالعربية中文日本語EntityQ1306232· pop 5· linked from 33 articlesPenetration depthmeasure of how deep light or any electromagnetic radiation can penetrate into a materialAvailable in 5 languagesDeutsch中文العربيةCatalanvia Wikidata sitelinks · CC0Connectionsskin effectEntityInternational Standard Book NumberEntityCategoriesElectromagnetic radiationScattering, absorption and radiative transfer (optics)Spectroscopy