Wan Anavan
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- Homework Statement
- Analysis of Angular Momentum
- Relevant Equations
- Commutators
is my solution correct?
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A Simple angular momentum analysis question (check my solution please)
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is my solution correct?
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Not the way you write it. $$[L_x,L_y]=-i\hbar L_z$$
[edit] Sorry for confusing you. I made (a single) a sign error too !
The intention was to write $$[L_x,L_y]=\ \ \ i\hbar L_z\\ \ [L_y,L_x]=-i\hbar L_z$$
Two wrongs doesn't make a right
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Wan Anavan said:
You are not being careful enough. You must write out more steps as you're going wrong with the shortcuts.
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No. Write out ##L_+## and ##L_-## and explicitly multiply
Wan Anavan
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BvU said:
PeroK said:
then the answer is not zero
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This time answer and solution are correct.
You can check yourself by working out ##\Bigl [L_+,L_-\Bigr ]##
You can check yourself by working out ##\Bigl [L_+,L_-\Bigr ]##