1669Double RefractionRasmus Bartholin
Publishes observations of double refraction in Iceland spar.
Historical records for Denmark in 1669, rendered directly from the World History Database and ordered by month, day and event.
Publishes observations of double refraction in Iceland spar.
Shows that one crystal can split a light ray into two paths.
This page is generated from stored World History Database records matching the exact country and year shown above. Exact duplicate display records are collapsed. Records without a month are listed after the monthly sections. Source provenance varies by record; formal academic citation should be checked against the relevant primary source, archive or specialist historical reference.