- #1

rsaad

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## Homework Statement

Find the eigenvalues and eigenstates of the spin operator S of an electron in the direction

of a unit vector n; assume that n lies in the xz plane.

## Homework Equations

S|m>= h m|m>

## The Attempt at a Solution

This question is from Zettili QM and they have written:

n.S|m>= (h/2) m|m>

I do not understand why are they taking a half.

If I take m=1/2 in

**S|m>= (h/2) m|m>**, I get h/4 but the answer should be h/2, by using

**S|m>= h m|m>**.

So where am i going wrong?