(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The PE of a magnetic moment in an external magnetic field is given by U = -udotB. Calculate the difference in energy between the two possible orientations of an electron in a magnetic fieldB= .6kT

2. Relevant equations

3. The attempt at a solution

I realize electrons can have an up spin and down spin, but I am having a hard time doing this problem.

I believe I should be using g = 2 for the gyromagnetic ratio. So: (_h = h bar)

u_{z}= -g u_{B}J_{Z}/_h

u_{B}= e(_h)/(2m_{e})

Unfortunately then I don't know what I should have for J_{z}. (This is defined by my book as "any type of angular momentum).

So I guess my problem is that I don't know what I should use for angular momentum, since n and l aren't defined in the problem. Can anyone help clear this up?

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# Homework Help: Magnetic Moment, Electron Spin, Energy

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