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oddiseas
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Homework Statement
An electron has a magnetic quantum number m=2.What is the magnitude of the orbital magnetic moment.
Homework Equations
mu=eL/2m
The Attempt at a Solution
Now i figured that the above equation gives the magnitude of the orbital moment and the equation for the z component gives us the direction in which it points. The solution is eh/m, which means that the z component was used to find the magnitude. This has me confused, because with the angular momentum we use L,to find the magnitude and L(z) for the z component.
Why have they used the z component of the magnetic moment to find the magnitude?