Crossword clue: an optical device used to measure the rotation of the plane of vibration of polarized light
2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
an optical device used to measure the rotation of the plane of vibration of polarized light
an optical device used to measure the rotation of the plane of vibration of polarized light