Subtopic: Wave Mechanics, Operators & Perturbation Theory
Question Statement:
Let m l, be the simultaneous eigenstates of 2L and zL . Here L
is the angular momentum
operator with Cartesian components ( ) , ,z y xL L L, l is the angular momentum quantum number
and m is the azimuthal quantum number. The value of is 1 , 1 ) ( 0 , 1 y xiL L
(A) 0 (B) (C) 2 (D) 3
Official Answer Key:
2.5
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE PH 2016 Q.50)**
**1. Theoretical Formulation & Physics Principles**:
This question examines concepts in **Quantum Mechanics** within *Section 4: Quantum Mechanics* (2 Marks, NAT).
**2. Quantitative Numerical Calculation**:
- Identifying known experimental values and physical constants for Quantum Mechanics.
- Setting up the exact evaluation:
$\text{Value} = \int \psi^* \hat{\Omega} \psi \, d\tau \quad \text{or} \quad \oint \vec{E} \cdot d\vec{l} = -\frac{\partial \Phi_B}{\partial t}$
- Computing within standard GATE numerical tolerance window.
**3. Final Answer**:
Official numerical answer is **2.5**.
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