This is the 13079th most frequent Swedish word.
teorin
"Theorin" in English means "the theory."
Here, "teorin" is used to denote a specific theory related to an experiment as a key concept being discussed.
Teorin bakom detta experiment är väldigt fascinerande.
The theory behind this experiment is very fascinating.
In this sentence, "teorin" refers to a general body of theoretical knowledge that needs to be studied.
Hon studerar teorin för att förstå de grundläggande principerna.
She studies the theory to understand the fundamental principles.
Here, "teorin" refers to a hypothesis or idea that needs empirical validation or testing.