{"id":"S85136215","label":"Total internal reflection (Optics)","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85136215","normalized_label":"total internal reflection (optics)","broader":["http://id.loc.gov/authorities/subjects/sh85112207","http://id.loc.gov/authorities/subjects/sh85112261"],"aliases":["Internal reflection, Total (Optics)","Total reflection, Internal (Optics)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85136215","provider":"lcsh","revision":"f253aef599e1562b","taxonomy_revision":"f050b5d4780b1289","title":"Total internal reflection (Optics)","url":"/topics/S85136215","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"867167228708144644","address_version":"morton4x16-v1","coordinates":[0,20,19533,23552],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}