Q.

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

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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 is D.

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Detailed Solution

Spin quantum number does not come from Schrodinger equation.

s=12  +   and  12  havebeenassigned  arbitrarily.

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