Double Refraction
Publishes observations of double refraction in Iceland spar.
Historical biography archive · Updated 2026-11-03
Rasmus Bartholin Biography and Timeline
Follow Rasmus Bartholin through 2 dated historical records for Denmark.
Rasmus Bartholin, historical timeline
A chronological timeline drawn from matching World History Database records.
2Distinct records
1 of 1Page
1669–1669Years on this page
1669
Iceland Spar Experiment
Shows that one crystal can split a light ray into two paths.
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.