Q.No.10: - What is the magnitude of spin vector at atomic scale and what is the spin vector magnitude of quarks?

Q.No.10: - What is the magnitude of spin vector at atomic scale and what is the spin vector magnitude of quarks?

Answer: - The length of the spin vector is measured in reduced Planck constant ħ . For quarks  the measurements of the spin vector components along any axis can only yield the value of +ħ/2 or -ħ/2 . That's why quarks are called spin 1/2 particles. 

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