The quantum number `+ 1//2` and `-1//2` for the electron spin represent

Options

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

D

Explanation

Plus and minus sign only indicate the rotation of electrons around its axis in opposite directions. Hence two quantum mechanical spin states which have no classical analogue.