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

This problem is giving me a headache and unfortunately I can't find any example that is similar to it.

A hydrogen atom is in the n = 3, l = 2 state.

(a) What are the possible values of j?

(b) What are the possible values of the magnitude of the total angular momentum including spin?

(c) What are the possible z components of the total angular momentum?

2. Relevant equations

3. The attempt at a solution

(a)

I believe that j_{max}= l + 1/2

and j_{min}= l - 1/2 so...

jmax = 5/2

jmin = 3/2

so

j = 5/2, 3/2

(b)

J = L + S

J = sqrt( j (j+1) )

J1 = sqrt(35)/2 hbar --> (j =5/2)

J2 = sqrt(15)/2 hbar --> (j=3/2)

(c)

j = 3/2; mj = +- 3/2, +- 1/2

j = 5/2; mj = +-5/2, +-3/2, +-1/2

I am very unsure about this whole process. My book unfortunately doesn't have any examples of this process. Can anyone check my work and see if what I am doing is correct? In particular I am very unsure of part b, it just seems a bit strange to me despite following the formula.

Thanks

roeb

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# Angular Momentum (Modern Physics)

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