- #1

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- Homework Statement
- Measurement

Suppose an electron is in a spin state that can be described by

|ϕ⟩=3/√2|+⟩+1/2|−⟩

where + and – are eigenstates of Sz with eigenvalue +ℏ/2 and −ℏ/2.

If we measure z-component of spin of this electron, what is the probability of measuring spin up, +ℏ/2?

Answers within 5% error will be considered correct.

- Relevant Equations
- I myself want to know which formula we need to use.

I was not able to attempt since I don't know which formula or method can be used to solve the problem