Spin 1/2 - Is √3/2ħ or √¾ħ Correct?

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SUMMARY

The discussion centers on the calculation of the spin value for a spin 1/2 particle, specifically addressing the expression for the magnitude of the spin angular momentum. The Wikipedia article states that the correct expression is √(3/2)ħ, while the user initially calculated it as √(3/4)ħ. Upon further examination, it was confirmed that both expressions are equivalent, as √(3/4)ħ simplifies to √(3)/2ħ. This highlights the importance of careful simplification in quantum mechanics calculations.

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Isaac0427
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Hi,
I was looking at the wikipedia article for spin 1/2 http://en.wikipedia.org/wiki/Spin-½ and it stated that √(½(½+1))ħ=√3/2ħ. According to my math it is √¾ħ. Is this just a typo or am I missing something?
 
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Be careful, what you wrote is ## \sqrt{\frac 3 4 }\hbar ## and what the wiki page wrote is ## \frac{\sqrt 3}{2} \hbar ##. They're the same!
 
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Shyan said:
Be careful, what you wrote is ## \sqrt{\frac 3 4 }\hbar ## and what the wiki page wrote is ## \frac{\sqrt 3}{2} \hbar ##. They're the same!
Ah I see. I went off initial simplification, not realizing that they are the same.
 

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