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Derive an expression for the magnetic mo...

Derive an expression for the magnetic moment `(vecmu)` of an electron revolving around the nucleus in terms of its angular momentum `(vecl)`. What is the direction of the magnetic moment of the electron with respect to its angular momentum ?

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We have `mu = iA`
` = (e.v)/(2pir).pir^(2)`
` = (evr)/(2)`
`l = mvr`
`vr = (l)/(m)`
`vecmu = (-evecl)/(2m)`
The direction of `vecmu` is opposite to that of `vecl` because of the negative charge of the electron.
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