The rotation of the polarization plane is extraordinarily small in all gases, thus also in sodium vapour.
-- Pieter Zeeman
   
Pieter Zeeman   Name:
Pieter Zeeman
Type:
Physicist
Nationality:
Dutch
Birth:
May 25, 1865
Death:
October 9, 1943
https://www.nutquote.com/quote/Pieter_Zeeman