@prefix sampledescriptionvocabulary1: <https://purls.helmholtz-metadaten.de/skosmos/sdv/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix ns0: <http://server/unset-base/> .

sampledescriptionvocabulary1:RefractiveIndex
  skos:prefLabel "Refractive index" ;
  skos:definition "1. Measure of the bending of a ray of light when passing from one medium into another. (Britannica). 2. Determines the speed by which light travels through a medium other than a vacuum (https://www.ncbi.nlm.nih.gov/books/NBK592413/). 3. An optical medium is the ratio of the apparent speed of light in the air or vacuum to the speed in the medium. (Wikipedia)"^^ns0:None ;
  skos:broader sampledescriptionvocabulary1:OpticalProperty ;
  a skos:Concept .

sampledescriptionvocabulary1:OpticalProperty
  skos:prefLabel "Optical property" ;
  a skos:Concept ;
  skos:narrower sampledescriptionvocabulary1:RefractiveIndex .