Length of spin vector for spin-½ particle

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The discussion revolves around the calculation of the spin vector length for a spin-½ particle, with the initial answer provided as |S| = √3/2 * ħ. There is confusion regarding whether this value qualifies as angular momentum, as the question specifies it must be. Participants clarify that ħ indeed has the dimensions of angular momentum, suggesting that the original calculation may be valid. The conversation highlights the importance of understanding the relationship between spin and angular momentum in quantum mechanics. Ultimately, the clarification reinforces that spin-½ particles do possess angular momentum characteristics.
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Homework Statement
What's the length of a spin-½ spin vector in physical dimensions.
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My answer so far in |S| = √3 /2 *hbar but the question states it must be an angular momentum. Is this an angular momentum or am I missing something? Thanks
 
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##\hbar## has the dimensions of angular momentum.
 
(a) The polarisation pattern is elliptical with maximum (1,1) and minimum (-1,-1), and anticlockwise in direction. (b) I know the solution is a quarter-wave plate oriented π/4, and half-wave plate at π/16, but don't understand how to reach there. I've obtained the polarisation vector (cos π/8, isin π/8) so far. I can't find much online guidance or textbook material working through this topic, so I'd appreciate any help I can get. Also, if anyone could let me know where I can get more...

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