Question

The quantum numbers + 1/2 and – 1/2 for the electron spin represent :

• A. Rotation of the electron in clockwise and anticlockwise direction respectively.
• B. Rotation of the electron in anticlockwise and clockwise direction respectively.
• C. Magnetic moment of the electron pointing up and down respectively,
• D. Two quantum mechanical spin states which have no classical analogue.

Answer 1

Answer: (D)

Two quantum mechanical spin states which have no classical analogue.

Answer 2

Spin quantum number does not comes from Schrodinger equation.

s = + $\frac{1}{2}$ and – $\frac{1}{2}$ have been assigned arbitrarily.