🌐EnglishEnglishDeutschItalianoPolskiTürkçeРусскийไทย日本語EntityQ1973955· pop 9critical angleangle of incidence above which total internal reflection occursAvailable in 9 languagesDeutsch日本語ItalianoCatalanEstonianGreekPolskiTürkçeไทยvia Wikidata sitelinks · CC0