Consider a system of total angular momentum j=1. We want to carry out measurements on
J^z=ℏ10000000−1.
(a) What are the possible values will we obtain when measuring J^z?
(b) Calculate ⟨J^x⟩, ⟨J^x2⟩, and ΔJx if the system is in the state jz=−ℏ.
(c) Repeat (b) for ⟨J^y⟩, ⟨J^y2⟩, and ΔJy.