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

Find <l_{z}> using [itex]\Psi[/itex], where [itex]\Psi[/itex]=(Y_{11}+cY_{1-1})/(1+c^2)).

Y_{lm}are spherical harmonics, and <l_{z}> is the angular momentum operator in the z direction.

2. Relevant equations

<l_{z}> Y_{lm}= [STRIKE]h[/STRIKE]mY_{lm}

3. The attempt at a solution

The brackets around <l_{z}> are throwing me off. This isn't defined in my book, but am I just supposed to apply the above equation to [itex]\Psi[/itex]?

So <l_{z}> = [STRIKE]h[/STRIKE]m(Y_{11}+cY_{1-1})/(1+c^2)?

Also what would m be?

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# Quick Dirac Notation question

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