Which quantum number is not related with Schrodinger equation :-

Options

A. Principal
B. Azimuthal
C. Magnetic
D. Spin

Explanation

To determine which quantum number is not related to the Schrödinger equation, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Schrödinger Equation**: The Schrödinger equation is a fundamental equation in quantum mechanics that describes how the quantum state of a physical system changes over time. It involves a wave function (ψ) that contains all the information about the system.

2. **Identify Quantum Numbers**: The quantum numbers that arise from the solutions to the Schrödinger equation are:
- **Principal Quantum Number (n)**: Indicates the energy level of an electron in an atom.
- **Azimuthal Quantum Number (l)**: Relates to the shape of the orbital and can take values from 0 to (n-1).
- **Magnetic Quantum Number (m)**: Describes the orientation of the orbital in space and can take values from -l to +l.

3. **List the Quantum Numbers**: The three quantum numbers mentioned above (n, l, m) are directly related to the solutions of the Schrödinger equation.

4. **Identify the Spin Quantum Number**: The spin quantum number (s) describes the intrinsic angular momentum or "spin" of an electron. It can take values of +1/2 or -1/2.

5. **Determine the Relationship**: While the spin quantum number is important in quantum mechanics, it does not arise from the Schrödinger equation itself. Instead, it is a separate quantum number that accounts for the electron's spin.

6. **Conclusion**: Since the spin quantum number (s) is not derived from the Schrödinger equation, it is the quantum number that is not related to it.

### Final Answer:
The quantum number that is not related to the Schrödinger equation is the **spin quantum number (s)**.