Operators and eigenstates

[Slepton]

I am confused about operators and eigenstates. What does "an operator has two normalized eigenstates" mean ? Is there a way I can make a physical interpretation ? How are measurements made with these ?

[Bob_for_short]

Keep reading and learning: these question are answered.

[DaleSpam]

What does "an operator has two normalized eigenstates" mean ? Is there a way I can make a physical interpretation ?It means that when you make the measurement corresponding to the operator you will measure one of two values.