Assertion: sunspot's effect | /r/Synonym | zeeman splitting
Facets:
value: after dutch physicist pieter zeeman
type: OTHER
Source sentences:
text: The magnetic properties of sunspots were discovered by astronomer George Ellery Hale (1868-1938), in 1908 using a new instrument he had invented, and a newly-discovered physical effect called Zeeman splitting.
text: Sunspot magnetic fields cause the line to split in two—an effect called "Zeeman splitting" after Dutch physicist Pieter Zeeman who discovered the phenomenon in the 19th century.