Upvote:3
Norwegian citizens are treated like Polish and other EU citizens in this respect. That's because Norway and the rest of the EEA applies free movement rules and Directive 2004/38/EC.
The relevant UK visa is in fact called “EEA family permit” and official documents on related topics like the UK residence card or visa-free entry for the family of people making use of their rights to free movement in another country also all mention the EEA (actually I think Swiss citizens are mostly covered too, even if there is no mention of this anywhere in the pages I linked to).