Submitted by György Chityil ... on Fri, 01/19/2018 - 17:08 Hierarchy: NounDescription: {{physics}} The ratio of the speed of light in air or vacuum to that in another medium.Ngram: refractive indexNgram Text: refractive indexSource: WiktionaryIssue: 0Wiktionary tag: physicsNgram Count: 2Wikokit WikiText ID: 1143241
