Question Bank MCQ • 1 Mark Section 4: Quantum Mechanics Angular momentum

QB_PH_095: Angular momentum

Question Statement

The commutator $[L_x, L_y]$ of orbital angular momentum operators evaluates to:
(A) i\hbar L_z
(B) -i\hbar L_z
(C) i\hbar L_x
(D) 0
Correct Answer
A
Verified Key

Step-by-Step KaTeX Derivation & Detailed Explanation

### Solution: Fundamental angular momentum commutation: $[L_i, L_j] = i\hbar \epsilon_{ijk} L_k$.
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